Extradition from Mexico: How the Procedure Works and What an Extradition Lawyer Does

If you or a family member has been arrested, told that a foreign request exists, or located through an international police alert, the immediate task is to identify the legal instrument actually being used, obtain the Mexican case number and documents, and secure defence counsel before giving consent or making a substantive statement.

Who decides: the District Court or the Foreign Ministry?

Mexico does not use a single-court system in which a judge alone orders the final surrender. The process has distinct parts. The SRE receives and screens the formal request; the FGR asks the competent District Court to process it; the judge hears the person and issues a legal opinion; and the SRE then decides whether to grant or refuse extradition. The judicial opinion is important, but it is not the final executive decision.

Article 22 of the Ley de Extradición Internacional ordinarily assigns the case to the District Judge for the jurisdiction where the requested person is found. If the person’s whereabouts are unknown, the statute’s fallback refers to the District Judge in criminal matters on duty in the former Federal District—a historic label still present in the statutory text—so the currently assigned court should be confirmed rather than inferred from an old address or title. Article 23 says that acts taken by the judge in this extradition procedure are not subject to an ordinary appeal and that jurisdictional disputes are not admitted within the procedure.

Which legal instruments govern a request to Mexico?

Start with the treaty in force between Mexico and the requesting state, if there is one. Article 1 of the Ley de Extradición Internacional (International Extradition Law, LEI) explains its federal, public-order character and its role where no treaty exists; Article 2 says the statute’s procedure applies to requests received from foreign governments. A treaty may add or modify requirements, so the treaty and the current domestic text must be read together. Do not assume that a treaty used in another country’s case applies here.

For example, Mexico’s official treaty database lists the 1978 extradition treaty with the United States as in force and records a 1997 protocol as in force. That is an example, not a substitute for checking the requesting country’s own instrument. The same database lists treaties with other states and is the appropriate starting point for verifying current status and any recorded declarations.

Mexico is not an EU Member State, so the European Arrest Warrant (EAW) is not the mechanism for surrender to Mexico. Nor should a practitioner assume that the European Convention on Extradition or the European Court of Human Rights’ Rule 39 procedure applies to Mexico. The relevant international framework must be established from the requesting state’s treaty relationship with Mexico and any applicable universal convention, not borrowed from an EU or Council of Europe case.

What happens from a provisional request to the SRE decision?

The following table separates statutory periods from steps for which the law does not give a fixed number of days. The treaty applicable to the particular request may supply additional rules. The periods below are not a promise that a case will finish within a set number of weeks.

What does the request need to contain?

Article 16 of the LEI sets out the formal-request materials where the statute applies. In broad terms, the request must identify the offence; provide evidence of the offence and probable responsibility, or an authenticated final judgment if the person has already been convicted; include the relevant foreign criminal-law provisions on the offence, penalty and limitation period with an authorised statement of their validity at the relevant time; provide the authentic arrest warrant where one exists; and supply personal and identifying information. Where there is no treaty, Article 16 also requires the commitments referred to in Article 10. Treaty documents can differ, and the formal request may need correction under Article 20.

These are not just filing formalities. A mismatch in name, date of birth, passport details or fingerprints may raise an identity issue; an untranslated document can make it difficult to understand what is alleged; and an incorrect or incomplete statement of the requesting state’s law may affect whether the request meets the governing instrument. Counsel should compare the actual file with the treaty, not rely only on a police summary or a Red Notice printout.

What can happen before the formal request arrives?

Article 17 allows precautionary measures when a state indicates that it intends to submit a formal extradition request and asks for measures concerning a named person. The preliminary request must identify the offence and state that a competent authority has issued an arrest warrant. If the SRE considers there is a basis, it transmits the request to the FGR, which promptly applies to the appropriate District Judge for measures available under the treaty or law. The measure may include arraigo or another legally available measure; the precise order depends on the facts and the applicable instrument.

The critical clock starts when the preliminary measures are implemented, not simply when a family member first hears about a foreign investigation. LEI Article 18 describes a two-month period for the formal request; Constitution Article 119 describes detention under the judge’s order as lasting up to 60 calendar days. The judge must notify the SRE of the start of the period, and the SRE must inform the requesting state. If no formal request reaches the SRE within the statutory period, the preliminary measures must be lifted immediately. Counsel should obtain the court order and official date rather than calculate the period from rumour, an airport conversation or a notice from another country.

This 60-day rule concerns provisional measures pending a formal request. It does not mean that every person in a formal extradition case must be released after 60 days. Once the formal process is underway, different provisions govern the judicial stage, the SRE decision, any amparo proceedings and the eventual handover. There is no single blanket maximum detention period stated in the LEI for every stage combined. Treaty-specific provisions and the person’s other legal status must also be checked.

Can the person be released while the request is pending?

Article 26 allows the requested person to ask the District Judge for release on bail, assessed under the conditions that would apply if the relevant offence had been committed in Mexico. The judge is to consider the information in the formal request, the person’s circumstances and the seriousness of the alleged offence. Bail is therefore possible under the statute, but it is not automatic and should not be described as an entitlement in every case. The applicable treaty, the legal basis of custody, the actual order and any other detention warrant may affect the result.

Ask counsel to identify the exact custody basis in writing. A person may be detained under a provisional extradition measure, under an order issued after admission of the formal request, or under a separate Mexican criminal warrant. A challenge to one order does not necessarily dispose of another. Likewise, an immigration removal or deportation process is legally distinct from extradition; do not assume that stopping one process automatically ends the other.

Does Mexican nationality prevent extradition?

Not automatically. Article 14 of the LEI states that a Mexican national may be delivered to a foreign state only in exceptional cases, in the judgment of the Executive. Article 15 adds that Mexican nationality acquired after the acts underlying the request is not a bar to delivery. The wording must be read alongside the applicable treaty: for example, some bilateral treaties expressly permit extradition of nationals at the requested state’s discretion and may require a prosecution referral if surrender is refused solely on nationality grounds.

For a dual national, counsel should confirm which nationality the applicable treaty says is relevant and whether the person acquired Mexican nationality before or after the alleged conduct. A passport, birth record, naturalisation decision and dates can matter. Do not assume that holding a Mexican passport creates an absolute bar or that the executive must exercise its discretion in one particular way.

What safeguards and treaty conditions matter at the threshold?

Article 6 of the LEI sets a dual-criminality and penalty threshold in cases governed by the statute: an intentional offence generally must be punishable under both Mexican law and the requesting state’s law by imprisonment whose arithmetic mean term is at least one year. For negligent offences, the statute refers to offences treated as serious by law and punishable by imprisonment in both states. A treaty may express the threshold differently, so counsel should apply the treaty first where it governs.

The LEI's substantive conditions must be read with Article 1, which frames the Act's extradition conditions for cases where no treaty exists. Articles 7–9 address, among other matters, prior acquittal, pardon, amnesty or a completed sentence, limitation, offences within Mexican jurisdiction, political persecution, slavery and military offences. Article 10 Bis states a prohibition where there are well-founded reasons to believe the person would face torture or enforced disappearance. Article 10's specified commitments apply in cases without a treaty. Where a treaty governs, counsel must check its terms and Mexico's independent human-rights obligations; this guide does not analyse individual refusal grounds.

If more than one state requests the same person, Article 12 sets a statutory order of preference, including treaty-based claims, the place where the offence was committed, relative seriousness and, in the residual case, the first request or provisional-arrest request. Article 11 provides that delivery may be deferred if the person has a pending Mexican case or is serving a sentence for a different offence. These rules can affect timing and the state to which a person is delivered, even if a request is otherwise admissible.

Consent, speciality and a Red Notice are not the same thing

Under Article 28, if the person raises no exceptions within the statutory period or expressly consents to extradition, the judge issues the legal opinion within three days. Consent can shorten the judicial stage, so it should never be given casually or before the person understands the request, the consequences and any available interpretation. Consent to extradition is not automatically identical to waiving the hearing, and neither should be assumed to waive the speciality protection. Speciality concerns the offences for which the requesting state may prosecute after surrender; its scope and any waiver depend on the applicable treaty, the terms of consent and later conduct. Obtain advice before signing a consent or waiver form.

An INTERPOL Red Notice is an international police alert asking member countries to locate and provisionally arrest a person, subject to each country’s law; it is not itself a universal arrest warrant and does not replace the formal extradition request and Mexican judicial process. If the person was stopped after a database alert, ask the authority to identify the domestic order and the extradition documents actually relied on. A notice, a provisional request and a formal request are different procedural items and may have different dates.

What should an extradition lawyer do at each stage?

• At first contact: establish the person’s exact location, custody authority, case number, nationality, language needs and any separate Mexican warrants. Ask for a copy or a written description of the order rather than assuming that an alert is the whole legal basis.
• During SRE screening: compare the formal request with the treaty and Articles 16–20 of the LEI; check identity, authentication, translations, limitation provisions and the date on which any provisional period began.
• Before and at the first judicial appearance: arrange representation and interpretation, explain the request and distinguish the judge’s role from the SRE’s final decision. Do not allow a consent decision to be made before its legal effects are understood.
• Within the Article 25 periods: organise admissible records and evidence relevant to the limited statutory exceptions, maintain a clear chronology, and request an extension where the statutory test and circumstances justify it. Detailed grounds and litigation routes belong on the separate refusal page.
• After the judge’s opinion: track the SRE’s written decision and notification. If the SRE grants extradition, LEI Article 33 identifies amparo as the route to challenge the grant; detailed refusal grounds, deadlines and suspension issues are covered in the separate Mexico extradition refusal and remedies guide. Seek Mexican advice urgently, and do not confuse a challenge to surrender with a separate detention or immigration measure.
• Before handover: verify that the executable decision, treaty conditions, any court orders and the requesting state’s authorised receiving officials match the file. Keep a copy of the surrender record and the date the person was placed at the requesting state’s disposal.

Hypothetical example: an arrest before the formal request

Hypothetical: a traveller is detained in Mexico after a foreign state sends a provisional request, but the full extradition file has not yet arrived. The lawyer should not tell the family that release is automatic on day 60 or that the foreign alert alone proves an admissible request. The first steps are to obtain the Mexican judicial order, identify when the provisional measure was implemented, confirm that the SRE has notified the requesting state of the statutory period, and check whether a formal request reached the SRE within two months. If it did not, counsel can ask the competent authorities to lift the preliminary measure under Article 18. If the formal request arrived in time, the case proceeds under the separate formal-request timetable and the defence must prepare for the judicial appearance.

Documents the person and family should gather now

• The Mexican arrest or precautionary-measure order, court name, case number and the date the measure was implemented.
• Any SRE, FGR, police or court notice, plus the full extradition request and every annex that can lawfully be obtained.
• Passport, birth certificate, nationality or naturalisation documents, aliases and reliable identity records.
• The foreign arrest warrant or final judgment, the charging provisions, penalty provisions and limitation-law extracts supplied with the request.
• Certified translations, interpreter requests, medical records relevant to custody, and contact details for the person’s chosen lawyer and family representative.
• Documents showing any Mexican criminal case, sentence, immigration proceeding or other custody order that could affect the timing or legal basis of detention.

Keep originals safe and send copies to counsel. Do not alter documents, contact witnesses to coordinate evidence, evade lawful process or rely on a family member’s informal account instead of the official file.

Which Mexican city page should the family use?

The nationwide legal sequence is the same, but practical court, custody and access arrangements depend on where the person is found. For local details, consult the page for Cancún, Guadalajara, Mexico City, Monterrey or Tijuana that matches the person’s location. Those pages cover local practice; this guide explains the nationwide procedure.

This page provides general information, not individual legal advice. The site’s team coordinates cross-border defence with local counsel; to discuss a case, use the request page.