Aviation Disputes 2026 Comparisons

Mexico is a civil-law jurisdiction with a dispute-resolution framework that is primarily codified and statutory. The resolution of an aviation dispute depends on the nature of the controversy, with private civil and commercial disputes following local civil procedure, federal civil procedure, the new national civil and family procedure, and mercantile procedure.

However, due to reforms of the judicial system, civil and commercial proceedings of court cases are transitioning from predominantly written motion practice to a more orally guided procedure resting on orality, immediacy, concentration and active judicial case management principles.

Regulatory disputes involving permits, sanctions, inspections or other government acts are handled under federal administrative litigation, while passenger-rights claims are typically channelled through the consumer-protection system and related aviation rules.

Rather than fitting neatly into an adversarial or inquisitorial model, commercial litigation operates under a mixed system: the parties drive pleading and proof, but the judge actively directs hearings and the taking of evidence, and judges the case.

Pre-trial depositions and broad discovery are not available. Although limited pre-suit mechanisms and evidentiary preservation devices exist, there is no general right to conduct open-ended depositions or expansive document production.

The case is built through written pleadings and evidentiary offerings and then developed through oral hearings. Written submissions typically include the claim, defence response, counterclaim and formal evidence, questionnaires for parties to respond to under oath, and witness and expert testimony, while hearings proceed orally before the judge.

Witness testimony is permitted and, where relevant, witnesses with direct knowledge may be examined and cross-examined through written and oral questions in court. Expert evidence is also available, with questioning typically framed through written questionnaires and addressed in hearings.

Mexico has a dual-level court system in which federal and local forums co-exist. Many aviation-related commercial disputes may be brought in either forum, depending on the claim and litigation strategy. At the federal level, the system includes the Supreme Court, circuit-level tribunals, appellate bodies and district courts.

Locally, the system distinguishes between first-instance judges and appellate courts and is organised by subject matter into civil/commercial, family and criminal. Civil and commercial disputes follow civil and mercantile routes; regulatory challenges are heard in the administrative forum; consumer disputes are typically channelled through the consumer agency’s conciliation mechanisms; and aviation matters can also intersect with bankruptcy, labour and criminal court matters.

No specialised aviation courts exist. Aviation disputes are allocated by subject matter, mostly civil and commercial.

As mentioned previously, court cases are transitioning towards oral procedures. In oral civil and mercantile cases, the judge actively manages the case, presides over hearings, rules on evidence, directs debate and may limit irrelevant argument. Rulings may be issued during hearings on procedural matters, while final decisions are usually deferred to the judgment stage.

Procedural rules contemplate a preliminary hearing shortly after pleadings close and a trial hearing begins thereafter, but service issues, incidents, appeals and amparo proceedings can extend timelines substantially.

ADR is encouraged. Conciliation or mediation is built into preliminary hearings and consumer conciliation platforms are available. There is generally no penalty for refusing to settle, although unjustified absence from certain hearings may trigger a monetary sanction.

The core framework governing international commercial arbitration seated in Mexico is contained in the Commercial Code. It regulates the arbitration agreement, tribunal jurisdiction, procedure, interim measures, annulment, and recognition and enforcement of awards. The arbitration agreement must be in writing, and a competent judge must refer the parties for arbitration when a valid agreement is invoked.

Mexico’s regime is Model Law-based and broadly follows the UNCITRAL structure. The provisions reflect key concepts such as competence-competence, separability of the arbitration clause, party autonomy over procedure, limited judicial intervention, narrow annulment grounds, and enforceability of awards. Mexico is also a contracting state to the New York Convention.

In practice, the approach is arbitration friendly. Tribunals may rule on their own jurisdiction, including objections to the existence or validity of the arbitration agreement, and may proceed even while a jurisdictional challenge is pending.

A significant recent development is the 14 November 2025 reform, under which the National Civil and Family Procedure Code becomes supplementary procedure in mercantile matters and routes certain arbitration-support proceedings through voluntary-jurisdiction rules.

In Mexico, international arbitration is available for aviation business disputes, but it is rarely, if ever, prominent in aviation disputes. In practice, local parties tend to opt for court litigation or mediation rather than arbitration.

Mediation before a licensed mediator or an alternative justice centre has proved effective because agreements reached and duly recorded are treated as final judgments with res judicata effects. If the agreement is breached, the claimant may ask the competent judge for direct enforcement, which makes mediation particularly attractive in contentious aviation scenarios.

Passenger disputes are often handled through the consumer-protection authority’s complaint and conciliation channels, including online mechanisms, without prejudice to court proceedings.

Although arbitration is not the preferred method in aviation matters, the broader legal system does promote ADR generally in commercial disputes, which conceptually includes aviation. Conciliation can occur in court proceedings, and a judicial settlement approved by the judge is likewise treated as a final judgment with res judicata effects and is enforceable upon breach.

There is no general penalty for refusing to settle. The system promotes ADR through institutional design and judicial encouragement rather than by sanctioning a party for declining a settlement proposal.

In Mexico, bringing a defendant before a court requires compliance with rules on jurisdiction and venue. Jurisdiction is exercised by federal and local judiciaries, and competence is allocated by subject matter, territory, hierarchical level and, where applicable, the amount in controversy.

As a general rule, proceedings are filed before the court of the defendant’s domicile. Depending on the action, alternative forums may exist, such as the place where contractual obligations are to be performed. Jurisdiction may also arise through express or implied submission, to the extent permitted.

Valid service of process is a fundamental prerequisite, as the court’s authority over the defendant is not effectively triggered without proper notice.

Territorial rules may vary by the nature of the action. For example, in rem actions over real estate are filed where the asset is located, while in rem actions over movable property may be tied to the defendant’s domicile.

These standards are not applied uniformly across all forums. Their practical operation differs depending on whether the case is filed in a federal or local court, and on the particular procedure (civil, commercial, administrative, consumer, or other). The same dispute may therefore involve different competence assessments, even when the underlying aviation facts are similar.

In Mexican civil and commercial disputes, the general statute of limitations period is ten years since the breach of contract or since the date on which the ordinary action could be legally filed in court. Aviation transactions (including leases, subleases, and security interests such as aircraft non-possessory pledges) can be included in these types of cases and where applicable, they may be pursued through special or summary enforcement proceedings, but the applicable statute of limitations period to bring enforcement of these actions is generally three years. The limitations period may be tolled or interrupted by (i) filing the claim before the competent authority; (ii) a written acknowledgment of indebtedness, preferably executed before a person or institution vested with public faith (eg, a notary public); and/or (iii) entering into an amendment agreement and/or a novation.

In civil and commercial disputes, there is generally no mandatory pre-action or other extrajudicial procedure that must be completed as a condition precedent to filing a claim; in practice, the claimant’s ability to seek judicial relief is primarily supported by having performed, or being able to evidence performance of, its own contractual obligations or having a recognised legal basis for any non-performance.

Parties commonly take prudent extrajudicial steps to strengthen the record and reduce factual controversy, such as having original executed agreements based on an eventual legal action for breach of contract ready to be produced in court.

In order to exercise certain types of ordinary or executive actions derived from a breach of civil or commercial agreements as condition precedent, it is necessary to serve a formal termination notice or demand for payment and, where relevant, request redelivery/return of the aircraft.

There is no aviation-specific court procedure in Mexico. Lawsuits are filed under the applicable civil or commercial rules, whether ordinary, executive, summary or in rem.

The initial motion must, at a minimum, identify the parties, specify the type of proceeding, be addressed to a competent court, provide service of process domicile of defendant, appoint counsel, designate procedural domicile, set out a clear narrative of facts, state the relief sought, invoke legal grounds, and offer the supporting evidence. In certain actions, the plaintiff may request interim measures aimed at preserving the dispute and ensuring effectiveness of the judgment, including measures comparable in effect to judicial custody or repossession.

Complaints must not be vague or imprecise. If the court finds curable deficiencies, it typically orders clarification and grants a limited opportunity to cure; if not cured, the lawsuit may be rejected in a way that generally allows refiling, subject to statute of limitation periods.

Administrative matters follow their own structure. A challenge against a federal authority is commenced with a written administrative complaint identifying the claimant, the challenged act, the authority, facts, legal grounds, evidence, any interested third party, and the requested relief, with key attachments. Curable defects are typically subject to a short cure period.

Post-filing amendments are not unrestricted. They are generally allowed only in defined circumstances, usually through a supplemental complaint within the applicable deadline.

In civil and commercial proceedings, once a complaint is filed and admitted, the court issues a summons/service notice with complete copies of the initial lawsuit and all the exhibits; and service is effected only through a court-authorised process court secretary. If the defendant is served and fails to answer within the applicable statutory deadline (often about 15 calendar days), the defendant may be held in default and, depending on the type of action, there may be corresponding adverse procedural effects. Service is handled by the court.

When a defendant resides outside the court’s territory, service is pursued through letters rogatory to the competent domestic court or, if abroad, via international channels typically transmitted through the foreign affairs authority so the competent foreign authority effects service. Depending on the distance, the judge may grant the defendant additional days to produce its response.

If the defendant does not respond after being properly and legally served with the lawsuit, it will be deemed in default by the court. Special procedural provisions apply to present in default defendants and in absentia in default defendants.

Parties may appear personally or through duly authorised representatives, who must prove authority with documents such as a power of attorney or corporate authorisation filed upon first appearance. If authority is not properly evidenced, the court may require correction before recognising representation.

The ability to appear is based on legal capacity and valid authorisation rather than a special litigation licence. Where a party seeks recovery of legal costs, those costs are typically granted only if the party proves it retained counsel.

Foreign lawyers are not granted independent rights of audience in Mexican courts. In practice, they may assist in an advisory role, while formal representation in court must be carried out by locally authorised counsel holding proper powers.

Mexican law does not expressly recognise attorney-client privilege or work-product privilege in the common-law sense. Litigation is focused on the offering and admission of evidence, not broad disclosure, and confidentiality protections do not operate as a general privilege-based exclusionary rule.

There is likewise no formal distinction between external and in-house counsel for privilege purposes. The legal framework does not establish different confidentiality protections based on a lawyer’s employment status.

Court proceedings do not generally automatically impose attorneys’ fees on the losing party. Each side typically bears its own fees and expenses unless statutory grounds justify an award of costs.

A prevailing party may recover court costs in limited circumstances, commonly where the opposing party acted unlawfully, in bad faith or without sufficient legal basis. Recoverable amounts are usually confined to recognised procedural costs and fees allowed by law, rather than full reimbursement of all legal expenses.

If a first-instance judgment is confirmed on appeal, costs may become automatic for the prevailing party in both instances.

Requests for costs can be contested. The opposing party may challenge the legal basis for costs, whether specific items are recoverable, or whether claimed amounts are excessive.

In civil and commercial proceedings, costs are determined under the applicable judiciary organic law of the jurisdiction where the dispute is heard, which sets the percentages or amounts that may be awarded to the party compelled to litigate and that nonetheless prevails.

As to security for costs, the defendant cannot obtain an order requiring the claimant to post funds against potential costs.

Plaintiffs in civil or commercial actions, including aviation-related disputes, may request interim measures through motions before the trial or before the merits hearing. These applications are not limited to case management. They can be for precautionary measures such as attachment or preservation of assets, preparatory proceedings, and other relief intended to protect the effectiveness of a future judgment.

Executive civil and commercial actions produce summary-type outcomes, and parties may also obtain early resolution of issues through procedural defences and interlocutory judgments.

Common pre-trial dispositive objections include:

• lack of jurisdiction;
• lack of standing or authority;
• improper procedural route; and
• defects in representation.

If sustained, these objections may lead to dismissal, termination of a duplicated action, or correction of the procedure, rather than a full merits trial.

Timing is strict. Many objections must be raised when answering the complaint. They are often handled through incidental proceedings with short response periods. In executive proceedings, incidental motions typically do not suspend the main case.

The threshold generally requires clear documentary support. For interim remedies, the applicant must typically show a plausible claim and urgency or a real risk that enforcement would be frustrated without immediate protection.

Courts may grant injunctive-type relief through interim measures in disputes that include aviation-related matters when the applicant shows a prima facie claim and a real risk that a future judgment would be frustrated without immediate protection, such as concealment or dissipation of assets or loss of relevant property.

In executive or summary civil and commercial actions, attachment orders may be granted upon service of process, including over bank accounts. Other actions may allow sequestration, custody or deposit of goods, and preservation orders over property or rights located in Mexico. In some cases, courts may request that the plaintiff posts a bond to guaranty possible damages in granting the order, if the plaintiff does not prevail in the merits of the case.

Urgent relief may be requested before filing or during proceedings and is handled on an expedited basis. There is no formal nationwide system of out-of-hours judges, although local courts may have administrative duty arrangements for urgent matters.

Orders generally apply to assets or persons within Mexican jurisdiction and do not automatically extend to worldwide assets. However, they may bind third parties who hold the respondent’s assets or property, such as custodians, depositaries or debtors, if served with the order.

If a respondent disregards the injunction, the court may impose fines and other enforcement measures, issue compulsory compliance orders, and expose the respondent to damages liability and sanctions for disobedience of judicial orders.

Mexico does not recognise discovery in the common-law sense. There is no broad pretrial system requiring parties to disclose all relevant documents or communications, and no general mandatory disclosure regime in ordinary civil or administrative proceedings.

Instead, evidence is typically gathered ex ante by the parties and offered under the rules of the applicable procedure. In contractual disputes, it is common that the claimant must already have the original executed agreement (or certified copies) in order to file and prove the claim.

Each party bears the burden of offering evidence supporting its claims or defences within strict deadlines. The court manages admissibility, preparation and the taking of evidence, and sets hearings to receive it.

Available means of proof include documentary evidence (including original executed documents), confession under oath through position questions to the parties (personally and, when authorised, by proxy), witness testimony, expert evidence, judicial inspections, official reports and legal presumptions. Limited document production may be ordered in specific circumstances authorised by procedural rules.

Witness testimony is received through examination and cross-examination in a hearing before the judge.

Scope and costs are controlled by judicial oversight, including relevance, necessity, proportionality and timeliness. Improper or illegal evidence must be rejected.

There are no special procedures for aviation disputes. They are filed as ordinary civil or commercial actions, or, where applicable, special, in rem, summary or executive actions.

Historically, civil and commercial disputes have often proceeded in written form depending on the amount in controversy. Because aviation disputes involving aircraft are typically high value, they have frequently been handled as written proceedings, with pleadings and documentary evidence filed from the outset.

After service and the defendant’s response (and any counterclaim stages), the court schedules one or more hearings to admit and hear evidence. Witnesses and experts may be examined, and the judge reviews and assesses the evidence and later issues a final judgment. No jury trials exist in Mexico.

Evidence is offered within procedural deadlines and is subject to admissibility and preparation rulings by the judge. Parties may introduce expert evidence, and where expert conclusions conflict, the matter may be addressed through a court-designated third expert opinion.

Mexico is transitioning towards oral proceedings. From 2027 onwards, civil proceedings will be oral, while commercial procedure will continue to be mostly written, depending on the amount in controversy.

First-instance court hearings and transcripts are not publicly accessible. Amparo lawsuits tried in collegiate tribunals hold public hearings where magistrates vote that the judgment project be approved or rejected. In practice, accessibility depends on the applicable procedural framework.

Civil and commercial cases may be settled before the judge through a judicial agreement between the parties. Settlement terms generally remain confidential when reached through authorised mechanisms, subject to any applicable transparency, public record or disclosure requirements.

Court approval is required when the settlement is concluded within court proceedings. The judge reviews the agreement to confirm it does not violate law or public order, prejudice third-party rights, or contain manifestly disproportionate terms.

Once approved, the settlement becomes a judicial agreement and, for all legal purposes, is considered as a final judgment with res judicata effects.

If a party breaches the agreement, it is enforced through judicial enforcement proceedings before the same court. The court may issue enforcement measures to compel compliance under the applicable procedural rules.

A judicial agreement may be refused approval, challenged or set aside if it violates applicable law or public order, affects third-party rights, concerns matters that cannot legally be settled, lacks proper authority, contains serious disproportionality, or conflicts with a prior final decision or binding agreement.

A successful litigant in a commercial or civil aviation-related dispute may obtain compensatory relief, including payment of debts, damages and losses, specific performance where appropriate, rescission or termination of contracts, restitution/repossession, declaratory relief, and court costs when authorised.

Punitive damages are not typical in ordinary actions. They arise mostly in moral damages scenarios, but contractual liability is primarily compensatory and aimed at repairing proven loss rather than punishing the defendant.

There is no general statutory cap on recoverable damages in ordinary civil or commercial disputes. In claims involving money obligations, the claimant may seek principal amounts due, plus, if agreed, ordinary interest and moratory interest accruing until payment is effectively collected. In passenger-related claims, separate aviation-specific rules or international frameworks may impose caps, depending on the claim.

Interest may be awarded for both pre-judgment and post-judgment periods. If the contract sets an interest rate, courts may enforce it if valid; otherwise, a legal rate may apply. Post-judgment interest may continue accruing until payment.

Damages must be proved with evidence and typically require proof of the obligation, the breach, the loss (including, where claimed, lost profits or consequential loss), and a causal link. The calculation therefore turns heavily on documentary and expert support.

According to general constitutional and procedural rules, all first-instance judgments are subject to appeal by the party that did not prevail in its claims or defences in the judgment.

In Mexico, there are no special appellate mechanisms specifically for aviation matters. Aviation disputes follow the ordinary civil, commercial, administrative and constitutional review procedures applicable to other regulated sectors.

In an appeal, the appellant seeks a review of the final decision issued in the challenged proceeding, arguing and demonstrating illegal application of substantive or procedural laws stated in the judgment considerations based on the existing record. An appeal does not usually involve a full rehearing of the case. The appeal ruling may confirm or reverse and modify partially or totally the first-instance judgement.

The appellate authority considers the issues properly raised in the lower instance and preserved in the proceedings.

As a general rule, new arguments or claims may not be introduced on appeal.

Enforceability of Arbitration Agreements

Arbitration is not commonly selected to resolve aviation disputes.

However, it is governed by the Commercial Code under a Model Law-based framework. For an arbitration agreement to be enforceable, the parties must clearly express their intention to submit disputes to arbitration, and the agreement must be in writing. This is interpreted broadly and may be satisfied through contractual clauses, separate agreements or electronic communications.

Arbitrability of Aviation Disputes

There is no single exhaustive list of non-arbitrable matters. Arbitrability is assessed by whether the dispute concerns right the parties may resolve privately. Matters of public order and social interest, where state protection must prevail, fall outside arbitration.

In the aviation sector, most private commercial disputes (leases, maintenance liabilities, financing, guaranties and other contractual claims) are generally arbitrable except for action in rem, special, summary or executive procedures. Any other public-law disputes involving regulatory enforcement, administrative sanctions, certifications or safety oversight, are not arbitrable.

Governing Law and Enforcement Approach

Courts respect party autonomy in determining the law applicable to arbitration agreements. In enforcement, courts are generally arbitration-friendly and refer parties to arbitration unless the clause is clearly invalid, inoperative or incapable of performance.

Separability

The doctrine of separability is recognised. An arbitration clause may be treated as independent from the underlying contract and may survive challenges to the main agreement.

Competence-Competence

Mexico recognises competence-competence. Tribunals may rule on their own jurisdiction, including objections to the existence, validity or scope of the arbitration agreement. Jurisdictional objections should be raised early, typically no later than the statement of defence. Objections that the tribunal exceeded its authority should be raised as soon as the issue arises.

Judicial Review of Jurisdiction

Courts may intervene in limited circumstances. A court may be asked to stay litigation in favour of arbitration, and a party may seek judicial review of a tribunal’s preliminary jurisdictional ruling within the statutory period. Jurisdictional objections may also be raised at annulment or enforcement stages.

Non-Signatories

Legislation does not provide detailed rules on non-signatories. Tribunals and courts may extend arbitration obligations in limited circumstances based on contractual interpretation and general commercial principles, where evidence shows direct participation in performance, benefit from the agreement, substantial control over a signatory, or improper use of corporate structures.

These principles are not formally limited to domestic entities. In principle, foreign third parties may also be included where supported by the facts, although the courts remain cautious and require clear evidence to address due process concerns.

Confidentiality Framework

Aviation arbitration proceedings are highly uncommon. Arbitration law does not establish a broad statutory duty of confidentiality. The commercial arbitration legal framework does not provide for confidentiality and rather focuses on autonomy, enforcement and judicial support.

Therefore, confidentiality is typically driven by party agreement, the chosen institutional rules and commercial practice. In aviation disputes, parties often include express confidentiality provisions because matters may involve financing terms, technical documentation, maintenance records and operational information.

Protection of Pleadings, Evidence and Awards

Where confidentiality is agreed or imposed by institutional rules, pleadings, documentary evidence, witness statements, expert reports and hearings are generally treated as confidential between the parties.

Awards are also commonly treated as confidential, but disclosure may be necessary in annulment, recognition or enforcement proceedings, where the award and parts of the record may enter the judicial file.

Disclosure in Subsequent Proceedings

Arbitration materials may be disclosed or relied upon in later proceedings when necessary, including:

• enforcement or annulment;
• related litigation involving the same facts;
• requests from regulatory authorities; or
• insolvency proceedings.

Confidentiality may also be more limited where disputes intersect with regulatory oversight or public safety, or where allegations of fraud, corruption or criminal conduct trigger reporting or disclosure obligations.

Practically, parties should not assume confidentiality by default and should address it expressly in contracts and arbitration rules.

Arbitral tribunals seated in Mexico may grant interim or preliminary relief generally speaking; there are no specific forms of relief for aviation disputes. The framework authorises tribunals to issue provisional measures. However, tribunals cannot enforce such measures, and a judge should be asked to enforce them.

Interim measures issued by tribunals are generally binding, not merely advisory, but subject to court or recognition approval, and only courts may enforce them. They must be in accordance with the law and subject to limited safeguards and public-policy considerations.

Courts may also support arbitration by granting interim relief before the tribunal is constituted or when coercive authority is needed, including where third parties are involved, asset preservation requires state power, or compliance becomes contested. Courts may assist with evidentiary preservation where records or assets are at risk.

Mexican courts may provide support for arbitrations seated outside Mexico when they are in compliance with certain legal requirements and referred-to actions that are not exclusively reserved for local court proceedings or expressly forbidden from arbitration.

Arbitration law does not expressly regulate security for costs as a standalone remedy, and the commercial arbitration provisions do not set specific rules on when a tribunal may require security for a respondent’s legal fees or arbitration costs.

Arbitration proceedings are primarily governed by the Commercial Code, which applies to domestic and international commercial arbitration and is largely Model Law-based. For matters outside the commercial sphere, the national civil and family procedure framework may be relevant, and parties commonly supplement the law by choosing institutional rules.

The system is intentionally flexible. Parties have wide autonomy to agree on procedure, including the language, seat, number of arbitrators, appointment mechanisms, evidentiary procedures, hearing formats and confidentiality. If the parties do not agree, the tribunal has broad authority to determine procedure.

Certain safeguards are mandatory and cannot be waived, including equal treatment, the right to present the case, proper notice, arbitrator independence and impartiality, and basic due process.

Arbitrators’ powers generally include ruling on jurisdiction, issuing interim measures, setting evidentiary procedures, appointing experts, conducting hearings, evaluating evidence, issuing procedural orders and rendering the award. Tribunals may decide whether the case is heard in person, virtually or in written submissions.

Arbitrators’ duties include independence, impartiality, disclosure of circumstances that could raise doubts, and fair conduct of the proceedings. Failure to respect these duties may support challenges to the award.

Courts play a supportive role, assisting with appointments, interim measures, evidence-taking and enforcement, while generally refraining from interfering with procedural decisions.

Mexico does not impose specialised advocacy qualifications simply because a dispute involves aviation. The relevant rules depend on whether the dispute is in-court litigation or arbitration.

In domestic court proceedings, parties are typically represented by qualified Mexican lawyers or duly authorised representatives. Foreign lawyers may provide advice only with respect to foreign law, but they are impeded to appear as formal counsel in court.

In arbitration seated in Mexico, representation is more flexible. Arbitration law does not require representatives to hold a Mexican law degree, and parties may appoint representatives of their choice, including foreign lawyers, in-house counsel, and multi-jurisdictional teams.

Foreign-qualified lawyers may therefore represent parties in Mexico-seated arbitrations, which is common in cross-border disputes.

Local counsel is imperative where domestic law issues and court proceedings arise alongside the arbitration, such as interim relief before the courts.

Recovery of Interest

Tribunals may award interest when agreed in disputed contract. The framework does not impose a rigid formula, so tribunals exercise discretion based on the contract, applicable substantive law and the case circumstances. In aviation disputes, interest arises from unpaid rent, financing defaults, insurance delays, maintenance invoices and contractual damages.

Tribunals typically first look to any contractual interest provisions only when claimed by the movant. If the contract is silent, the tribunal may apply the relevant substantive law to determine whether interest is claimable and how it should be calculated.

Recovery of Legal Costs

There is no mandatory rule that one party must bear all the costs. Tribunals generally have discretion to allocate costs unless the arbitration agreement or institutional rules provide otherwise. Recoverable costs may include arbitrators’ fees, administrative costs, expert and attorneys’ fees, hearing expenses, translations and technical evidence costs.

Approach to Allocation

Mexico does not impose an automatic “costs follow the event” or strict cost-sharing rule. Tribunals weigh who prevailed, the degree of success, party conduct, efficiency and reasonableness. Many tribunals apply an outcome-based approach.

Mexico takes a flexible approach to evidence in arbitration. The commercial arbitration provisions do not impose detailed evidentiary rules comparable to court litigation, and the parties may agree on how evidence will be obtained and presented. If they do not, the tribunal has broad discretion.

At the pleading stage, parties usually file documentary evidence with the claim and answer, including contracts, correspondence, invoices, technical records, regulatory communications and expert materials. Tribunals commonly set schedules for further pleadings and organise disputed issues early.

Mexico does not follow broad, US-style discovery. Document production is typically narrower and requires the identification of specific relevant categories. Parties may nevertheless agree in the arbitration clause on the evidentiary and document production rules they wish to apply.

Privilege is not regulated in a highly developed arbitration-specific way. It is typically addressed by party agreement, institutional rules, conflict analysis or tribunal discretion.

Written witness statements and expert reports are common, and cross-examination is permitted, with format largely controlled by the tribunal.

Arbitrators lack the coercive powers of the courts. They may order parties to produce documents or attend hearings, but enforcement is limited, and third parties are generally not bound unless they participate voluntarily.

Courts may assist by ordering production of evidence or other measures when judicial coercion is necessary.

Formal Validity Requirements

An arbitral award must be in writing and signed by the arbitrator(s). If a signature is missing, the reason should be stated. The award must indicate the date, the seat of arbitration and the final decision on the issues submitted. Parties must be formally notified, as notice typically triggers the time limit to seek annulment.

Unless the parties agree otherwise, awards must be reasoned. If the parties settle, the tribunal may issue an award on agreed terms if requested.

Time Limits

The law does not impose a strict statutory deadline for issuing an award. Timeframes are typically governed by party agreement, institutional rules and the procedural schedule set by the tribunal.

Available Remedies

Tribunals have broad discretion to grant remedies supported by the claims and applicable substantive law, including monetary relief, declaratory relief, specific performance, interest, costs, and certain provisional measures.

Rectification and Correction

After the award, tribunals may correct typographical, calculation or similar errors, and clarify limited aspects, without reopening the merits.

Injunctive Relief

Tribunals may grant interim measures, but they lack coercive power; court assistance is needed for enforcement.

Mexico does not provide a broad appeal on the merits of arbitral awards. The principal recourse is an action for annulment, aimed at serious jurisdictional or procedural defects rather than re-litigating the dispute.

Grounds for challenge are limited and include lack of capacity, an invalid arbitration agreement, lack of proper notice, inability to present the case, the tribunal exceeding the scope of the agreement, improper constitution of the tribunal, non-compliance with agreed procedure, non-arbitrability, and conflict with public policy.

Procedure

A party must file the annulment action within the statutory time limit, before the competent court linked to the seat of arbitration or as determined by procedural rules. Enforcement may be stayed only under limited circumstances.

Courts do not conduct de novo review. They do not re-evaluate technical evidence, contractual interpretation or damages simply because a party disagrees with the outcome.

At the recognition and enforcement stage, parties may raise limited objections, generally aligned with annulment-type grounds.

Parties cannot contractually create broader appeal rights that undermine arbitration finality. The legal grounds for annulment and resistance to enforcement function as mandatory limits.

A party’s assets can be investigated through public registries prior to filing suit. Real estate and corporate shareholdings can be searched in the Public Registry of Property and the Public Registry of Commerce, and security interests can be reviewed in the Unique Registry of Mobile Guaranties.

During enforcement, and at the creditor’s request, judges may order financial institutions to report balances in the debtor’s bank accounts and investments. Because of banking secrecy laws, this type of financial information is typically only available through a judge’s order.

Freezing and seizure measures are available as interim protection or in enforcement. At the request of the court, bank accounts may be frozen and other assets, including corporate shares, may be attached to secure payment.

Following a final judgment or arbitral award, enforcement proceedings allow the creditor to request investigative measures and court assistance to identify assets not previously detected and determine how enforcement will be carried out. This can include orders directed to financial institutions to locate accounts and balances, and asset information from public registries data for real estate and movable assets as well as commercial interests.

Final judgments are enforced through enforcement proceedings, typically before the judge where the assets are located. In ordinary proceedings, the steps are generally:

• If the judgment did not grant time for voluntary compliance, the defendant is granted three to five days to comply.
• If the defendant fails to comply, the judge issues an enforcement order requiring payment or delivery of the asset owed, in action in rem cases.
• If resistance continues, the judge may order means to compel compliance, including fines, arrest, assistance from law enforcement, and the breaking of locks against those opposing the proceeding.
• The judge may request assistance from public authorities and conduct investigative proceedings to ensure full compliance.

Executive and special proceedings can vary in detail.

Courts do not charge court fees, but enforcement creates extra-judicial expenses such as private security, moving services, porters, appraisals and notaries.

Where assets are seized, appraisal and judicial auction procedures apply, including expert valuations and publication notices through newspaper edicts, and several judicial auctions may continue with price reductions until the assets are sold or adjudicated to the plaintiff.

Aircraft-related enforcement is most efficient when based on in rem actions (eg, non-possessory pledge enforcement) or mediation agreements duly recorded where possession and ownership are undisputed, because the claimant can proceed directly to enforcement upon breach, saving time.

The materials provided do not specify a single typical enforcement timeframe; this varies with objections, asset location and the chosen enforcement route.

When the Defendant Appears in Court

First-instance judgments may be appealed, and the appeal decision may be challenged through an amparo lawsuit. Once challenges are exhausted, the judgment becomes final with res judicata category and subject to enforcement by the first-instance judge.

Defences against enforcement are specifically defined in law and include: payment, transaction, set-off, arbitration agreement, novation, deferral, remission, and other arrangements that modify the obligation.

Remedies available against enforcement orders are limited, and those that exist generally do not stay enforcement, because enforcement of judgments is a constitutional right giving access to justice, and a matter of public order and social interest.

When the Defendant Does Not Appear in Court

If the defendant alleges it did not appear in court due to lack of service or improper service, it may challenge enforcement on that basis. The defendant may seek nullification of proceedings by arguing it was not properly summoned, which can be raised in first instance, appeal and amparo, and the validity of the summons will be examined.

Judgments Not Subject to Enforcement

Declaratory judgments ordering a party to “do not” or “abstain” are typically not enforceable through the same enforcement procedure due to their nature. Aviation judgments more commonly order payment, delivery of possession of aircraft, deregistration or other obligations requiring material enforcement.

Foreign final judgments may be enforced through a recognition and homologation procedure, the exequatur. The request is commonly presented via letters rogatory and processed through the foreign affairs channel to the competent Mexican court.

As prerequisites, the materials indicate, among other things, that the request be in due form, that enforcement not derive from an in-rem action, that the foreign court had jurisdiction, that the defendant was duly summoned, and that the judgment is final, res judicata and enforceable.

Stages

First, the judgment is submitted via a letter rogatory to the foreign affairs authority for delivery to the competent Mexican court.

Second, if accepted, the judge orders service on the defendant.

Third, within nine days, the parties state their positions and offer evidence.

Fourth, if necessary, evidence is heard, and the judge issues a ruling recognising the judgment and ordering enforcement.

Enforcement

Enforcement then proceeds as with a domestic judgment, with the judge specifying whether any aspect must follow foreign law, as long as it does not violate protected rights.

Costs

Courts do not charge court costs, but extra-judicial enforcement expenses may arise (security, movers, appraisals, notaries, etc).

Timeframes

Although the procedure can be short in theory, opposition and legal remedies frequently delay recognition and it can take up to 18 months, plus enforcement time that may reach up to two years depending on objections and the enforcement route.

Foreign judgment enforcement may be challenged (i) during recognition proceedings; or (ii) by challenging the decision granting or denying recognition and enforcement.

Challenge During Recognition Proceedings

During recognition, the defendant may object within nine days of service and argue that prerequisites have not been met. Grounds include that the judgment concerns an in-rem action, the foreign court lacked jurisdiction, the defendant was not duly summoned, or the judgment is not final (including when it is still subject to appeal abroad).

The defendant may also assert defences recognised under law that affect the obligation, such as payment, settlement, discharge, arbitration agreement, novation, deferral, remission, or other modifying arrangements.

Challenging the Ruling or Denying Enforcement

If the exequatur is granted, the losing party may appeal the ruling granting or denying enforcement. The appeal court must focus on the judge’s reasoning and omissions in the challenged homologation decision only, without any reference to the merits of the main case, or to unrelated issues. The losing party may then file an amparo lawsuit against the appeal decision.

Mexico ratified the 1958 New York Convention in 1971 and entered no reservations.

Enforcement of arbitral awards is carried out through enforcement proceedings. The Convention is incorporated into the commercial arbitration framework and the national procedural framework governing arbitral proceedings.

Under the approach described, enforcement does not require homologation. To secure enforcement, the party seeking enforcement must file its motion to a competent judge. The applicant should attach the original award, the arbitration agreement and, if applicable, Spanish translations.

The judge then orders enforcement according to what is required by the award, which may include seizure of assets, freezing of funds or investments, or other coercive measures appropriate to the obligation.

There is an important limitation: foreign judgments concerning in rem actions are not recognised, and this rule also applies to the enforcement of arbitral awards.

There is no single “most efficient” method in the abstract, because efficiency depends on the obligation and asset location.

A party may object to enforcement once notified of enforcement proceedings. Since enforcement is pursued as a means of execution, the party may raise defences that affect the obligation, including payment, settlement, discharge, arbitration agreement, novation, deferral, remission, and other modifying arrangements.

A party may also seek to invalidate the award by asserting grounds for nullity, including lack of capacity, an invalid arbitration agreement, lack of notice, inability to present the case, excess of scope, improper constitution of the tribunal, non-compliance with the agreed procedure, non-arbitrability, and conflict with public policy.

Additional objections may be raised, such as arguing that the enforcement period has expired or that the award is not final, all of which will be assessed by the judge based on the evidence provided.

Ordinary and extraordinary remedies (including amparo) against enforcement are limited and generally should not stay enforcement, because enforcement of judgments is treated as a matter of public order and social interest.

As to sovereign immunity, it is not recognised as a ground for refusing to enforce arbitral awards, so it should not prevent enforcement against a state or state entity.

Judicial reforms which refer to civil and commercial proceedings of court cases, including aviation-related disputes, are transitioning from predominantly written motion practice to oral-form procedures, resting on orality, immediacy, concentration and active judicial case-management principles. This shift affects how evidence is introduced and tested and may change litigation strategy and timelines, as courts increasingly manage hearings and procedural cleansing through preliminary hearings.