Validity of foreign powers of attorney in Mexico

Powers of Attorney Granted Abroad with Effects in Mexico

In Mexican legal, corporate, and notarial practice, the use of powers of attorney granted abroad to produce effects within national territory has become increasingly common. This occurs in a wide variety of contexts, including real estate transactions, corporate acts, judicial proceedings, and administrative procedures. The main legal issue generally does not lie in the existence of the power itself, but in its validity and enforceability before Mexican authorities, which depends on compliance with both national legislation and applicable international instruments.

The validity of powers of attorney granted abroad is subject to compliance with three fundamental considerations:

Formalities of the issuing jurisdiction

The notarial act must comply with the formalities of the jurisdiction in which it was executed (locus regit actum), in accordance with Articles 12 and 13, Section IV, of the Federal Civil Code, as well as their corresponding provisions in local legislation.

2. Authentication of authenticity

The authenticity of the notarial act must be duly evidenced. As a general rule, this is achieved through legalization, a procedure by which the competent authorities certify both the signature and the official capacity of the notary public who issued the instrument. However, this requirement may be replaced through international mechanisms:

• Apostille: Applicable when the country of origin is a party to the 1961 Hague Convention Abolishing the Requirement of Legalisation for Foreign Public Documents. The apostille is a single certification issued in the country of origin, validating the authenticity of the signature and the authority of the notary, without addressing the substantive content of the document.
• Washington Protocol: adopted within the framework of the Organization of American States, it facilitates the recognition of such instruments among member states. Notwithstanding the above, the substantive validity and scope of the power of attorney within Mexico continue to be governed by national legislation and applicable treaties.

3. Translation into Spanish

When the power of attorney is drafted in a foreign language, it must be translated into Spanish in accordance with federal or local legal requirements. For its incorporation into a notarial instrument, a certified expert translator must appear before the Mexican notary public and provide an official translation, which will be attached to the corresponding notarial deed.

Additional requirements

The foreign notary must certify the identity, legal capacity, and powers of representation of the grantor. In this regard, the Supreme Court of Justice of the Nation (Case law: P./J. 13/94) has established that powers of attorney granted in States party to the Washington Protocol should not be subject to the same formalities required for domestic powers of attorney.

In practice, ratification or notarization before a Mexican notary public is frequently required. Likewise, the content of the instrument must be adapted to the Mexican legal classifications of powers of attorney:

• For litigation and debt collection
• For acts of administration
• For acts of ownership (requiring the highest degree of precision)

In transactions of significant legal or economic relevance, it is advisable to coordinate the drafting of the instrument between the foreign notary and a Mexican notary, ensuring from the outset compliance with the applicable formal and substantive requirements in Mexico.

Common issues in practice

• Lack of proper notarization (when required)
• Insufficient scope of granted powers
• Translation errors
• Deficiencies in the proof of corporate representation

Recommendation

It is strongly recommended to obtain specialized legal advice to ensure that the instrument complies, from the moment it is executed, with all requirements established in applicable international treaties and in Mexican federal and local legislation.