Yes, you can sue someone in Mexico from the United States, but the case runs on two legal systems at once and takes considerably longer than a domestic lawsuit. You’ll need to decide which country’s courts should hear the dispute, hire a Mexican attorney if the case belongs there, arrange international service of process, and, if you win in a U.S. court, go through a separate Mexican proceeding to make the judgment enforceable. No treaty between the two countries makes that last step automatic, which is the single fact that shapes every strategic choice along the way.
Where the Case Belongs
Jurisdiction turns on where the dispute arose and where the defendant lives or holds assets, not on the nationalities of the parties. If a contract was performed in Mexico or you were injured there, Mexican courts will almost certainly have jurisdiction. If the defendant operates a business, owns property, or has other consistent ties to a particular U.S. state, filing in the U.S. may be possible.
Federal courts in the U.S. can hear disputes between a U.S. citizen and a citizen of a foreign country under diversity jurisdiction. Article III of the Constitution extends the judicial power to controversies “between a State, or the Citizens thereof, and foreign States, Citizens or Subjects.”1Constitution Annotated. ArtIII.S2.C1.16.1 Overview of Diversity Jurisdiction Federal jurisdiction alone isn’t enough. You also need personal jurisdiction over the defendant, which requires showing meaningful connections between the defendant and the state where you file. Courts call these connections “minimum contacts,” a standard rooted in the Fourteenth Amendment’s due process protections.2Constitution Annotated. Amdt14.S1.7.1.4 Minimum Contact Requirements for Personal Jurisdiction Owning property in the state, regularly conducting business there, or deliberately targeting customers there can each satisfy the test.
Many cross-border commercial agreements include a forum selection clause naming the courts that will handle disputes. Both U.S. and Mexican courts generally honor those clauses. One caveat: Mexico’s Supreme Court has signaled that forum selection clauses buried in adhesion contracts or standard terms-and-conditions may be struck down when they force one party into a distant forum with no connection to the transaction. If you’re drafting a new agreement with a Mexican counterpart, negotiating the forum clause upfront is one of the highest-value moves available.
Why a U.S. Judgment Isn’t Automatically Good in Mexico
A common assumption is that a U.S. judgment can be enforced in Mexico through some international agreement. It cannot. The U.S. State Department is explicit that no bilateral treaty or multilateral convention in force between the United States and any other country provides for reciprocal recognition and enforcement of judgments.3Travel.State.Gov. Enforcement of Judgments Win in a U.S. court and you still can’t walk the judgment into a Mexican court and start collecting on assets there. You’ll need a separate recognition proceeding in Mexico, called homologation. Knowing this before you file changes how you weigh venue, because a judgment you can’t enforce is an expensive piece of paper.
What Filing in Mexico Requires
You must hire a Mexican attorney licensed to practice in the country. Foreign lawyers who haven’t gone through Mexico’s licensing process cannot represent clients in Mexican courts.4APEC Legal Services Initiative. APEC Legal Services Initiative – Mexico A U.S. lawyer can coordinate strategy, but a Mexican abogado handles the filings and appearances.
Before filing, gather every document that supports your claim: the contract at issue, police or incident reports, medical records, correspondence. Anything not already in Spanish needs a certified translation. Pull together full legal names and addresses for any witnesses.
Because you won’t be showing up in court, you’ll execute a power of attorney giving your Mexican lawyer authority to act for you. Signed in the U.S., that document needs notarization and then an apostille to be recognized in Mexico.5Sección Consular en Londres. Powers of Attorney An apostille is a standardized certificate that authenticates a document for international use. Your state’s Secretary of State office typically issues them, and fees generally run between $10 and $20.
One background point worth noting: Mexico is currently rolling out a new unified National Code of Civil and Family Procedures, enacted in 2023, that replaces the older patchwork of separate federal and state procedural codes. Full implementation must be completed by April 1, 2027.6Hague Conference on Private International Law. Mexico – Central Authority and Practical Information Ask your Mexican attorney which code currently governs the court where you’ll file.
Serving a Defendant in Mexico
Once a U.S. lawsuit is filed, you have to formally deliver the legal papers to a defendant in Mexico. Both countries have signed the Hague Service Convention, which governs how that happens. Mexico has formally objected to every alternative service method listed in Article 10 of the Convention, including service by mail and direct service through diplomatic or consular agents.7Hague Conference on Private International Law. Declaration/Reservation/Notification That leaves the formal Central Authority channel as the only route.
The process: prepare the complaint, summons, and a trilingual request form, translate everything into Spanish, and submit the package to Mexico’s Central Authority, which is the Directorate for International Procedural Cooperation within the Ministry of Foreign Affairs.6Hague Conference on Private International Law. Mexico – Central Authority and Practical Information The Central Authority forwards the documents to a local court, which arranges formal service on the defendant.
Expect this to take time. Mexico’s own practical information on the Convention estimates two to six months for execution of a service request.6Hague Conference on Private International Law. Mexico – Central Authority and Practical Information Delays can push that past six months when the defendant is hard to locate. Build the wait into your litigation calendar.
Turning a U.S. Judgment Into a Collectible One in Mexico
If you already have a final U.S. judgment and the defendant’s assets sit in Mexico, a Mexican court has to recognize the judgment before you can collect. The proceeding is called homologation or exequatur. The Mexican judge doesn’t retry your case but does review whether the U.S. proceedings met baseline fairness requirements.
What the Court Reviews
Under Article 571 of Mexico’s Federal Code of Civil Procedure, the Mexican judge evaluates several conditions before granting recognition:
- Proper service: the defendant was formally notified of the U.S. lawsuit and had a real opportunity to appear and defend.
- Jurisdiction: the U.S. court that issued the judgment had proper authority over the case.
- Finality: the judgment is final and no longer subject to appeal in the U.S.
- No parallel Mexican case: no Mexican court is already handling the same dispute between the same parties.
- Public policy: the judgment doesn’t violate Mexican public policy or fundamental legal principles.
- In personam only: the judgment was based on a personal claim, not a ruling about rights to specific property located outside the U.S. court’s territory.
One helpful feature: the reciprocity analysis doesn’t require you to prove that U.S. courts would enforce a Mexican judgment. The burden falls on the defendant to affirmatively show that the originating jurisdiction refuses to recognize similar foreign judgments. If the defendant can’t make that showing, the reciprocity condition is satisfied.
The Letter Rogatory and the Hearing
The homologation request goes in as a formal document called a letter rogatory, essentially a structured petition asking the Mexican court to recognize the foreign judgment. You don’t route it through diplomatic channels; your Mexican attorney files it directly with the competent court. The letter rogatory must include an authenticated and apostilled copy of the U.S. judgment, proof the defendant was properly served, evidence that the judgment is final, and complete Spanish translations of everything.
After filing, the Mexican court serves the judgment debtor and gives them nine days to respond. The debtor can oppose recognition and introduce evidence. The court holds a hearing, considers both sides, and rules on homologation. Either party can appeal. This is a summary proceeding, so it moves faster than a full trial, but faster in this context still means months.
Finding the Defendant’s Assets
Recognition alone doesn’t get you paid. You still need to identify what the defendant owns. Mexico has several public registries that help. Each state maintains a property registry showing real estate ownership, liens, and encumbrances. The Public Registry of Commerce, accessible through a digital system called SIGER, shows information about a company’s shareholders and capital. The National Securities Registry tracks publicly issued securities such as bonds and stock certificates.
Bank accounts are different. Banking information in Mexico is protected by banking secrecy. You can’t simply look up someone’s accounts. Access requires a court order obtained through the judicial proceeding itself, and a judge must authorize the disclosure.
Deadlines to Watch
Mexico’s general statute of limitations for civil claims is ten years, with shorter periods, including one-year and five-year deadlines, for certain types of actions. If your dispute involves a personal injury that occurred in Mexico or a contract performed there, the Mexican limitations period controls regardless of what your U.S. state’s deadline would be. Missing it extinguishes the right to sue entirely, so pin down the applicable period with a Mexican attorney early.
The clock typically starts running from the date the injury occurred or the breach happened, not from when you discovered it. Cross-border disputes often involve months of informal negotiation before anyone files, and that time counts against you.
How Long the Process Takes
Most civil and commercial cases in Mexico reach trial-stage resolution within 12 to 36 months, though complex matters run longer. That doesn’t include the additional months for international service or any appeals. Enforcing a U.S. judgment through homologation adds time on top of whatever the U.S. case already took. From the decision to pursue a cross-border claim to actually collecting money, a realistic timeline is measured in years.
When Arbitration Beats Litigation
For commercial disputes, arbitration is often a faster and more predictable route than either country’s courts. Mexico is a signatory to the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards, the Inter-American Convention on International Commercial Arbitration (the Panama Convention), and the Montevideo Convention on the extraterritorial validity of foreign judgments and arbitral awards. These treaties give arbitral awards a stronger enforcement framework in Mexico than court judgments have.
If you haven’t yet signed a contract with a Mexican counterpart, an arbitration clause naming a neutral venue and governing rules can prevent later headaches. If a dispute has already started and there’s no arbitration clause, both parties can still agree to arbitrate, though a reluctant defendant rarely agrees after conflict has erupted. Enforcement of an arbitral award in Mexico runs through a well-established statutory process under the Mexican Commerce Code, avoiding the more uncertain homologation route court judgments require.3Travel.State.Gov. Enforcement of Judgments
Before You File
Cross-border litigation between the U.S. and Mexico is expensive, slow, and procedurally unforgiving. A few steps taken early save significant time and money later.
- Confirm the defendant has collectible assets. A judgment against someone with no reachable property or accounts is worthless. Mexico’s public registries can help verify what the defendant owns before you invest in litigation.
- Check the statute of limitations in both countries. If you may file in either jurisdiction, confirm you’re within the deadline for whichever you choose.
- Read any contract for forum selection or arbitration clauses. They may lock you into a specific forum or open a faster enforcement path.
- Hire coordinated counsel. Most cases need both a U.S. and a Mexican attorney working together, with the Mexican lawyer handling filings and appearances and the U.S. lawyer managing the domestic side and preparing documents for apostille and translation.
- Budget for translation and authentication. Every document filed in a Mexican court needs a certified Spanish translation, and every U.S. document used in Mexico needs an apostille. Costs accumulate quickly in document-heavy cases.
The most common mistake in these cases is treating them like domestic lawsuits with an extra step. They aren’t. They’re proceedings that run on two legal systems, hinge on international service timelines, and end in a judgment enforcement process with no guaranteed outcome.