eSignature legality summary
An electronic signature — electronic data in or associated with a data message that identifies the signer and shows their approval — produces the same legal effect as a handwritten signature and is admissible in evidence. Where law requires writing, the data message must be kept in its original form, remain available for later consultation, and be attributable to the signers. For private legal acts, an electronic signature validly expresses consent with no restriction on form.
Types of permitted electronic signature
Mexican law recognizes a general electronic signature and an “advanced” (digital) signature, which additionally requires creation data corresponding exclusively to and under the sole control of the signer, tamper-evidence for both the signature and the document, and a digital certificate from a government-approved certification provider. Notably, Mexican law does NOT give an advanced signature greater validity by default — if challenged, the party relying on it (even an advanced one) bears the burden of proving validity, unless it includes a digital time-seal.
Documents that may be signed electronically
Widely used for private-party transactions not subject to a regulator or a government filing. Since 2023, corporate shareholder and board meetings may be held virtually with minutes signed electronically; since 2024, negotiable instruments (e.g., promissory notes) may be issued, endorsed, and transferred electronically (electronic certificates of deposit require cryptographic systems and advanced signatures).
Use with caution / not typically appropriate
Avoid relying on a plain electronic signature where the document will be filed with a government agency or regulator. Because advanced signatures get no automatic evidentiary boost, add a digital time-seal and a strong audit trail for high-value matters.
- Documents to be filed with a government agency or regulator (use the required method)
- Acts subject to regulatory supervision or submission
- Matters where law requires a specific notarial or registered form
Seminal court cases
None reported.
Primary sources
- Federal Civil Code (Mexico)
- Federal Commerce Code (Código de Comercio)
Disclaimer: This guide is general information, not legal advice, and is not a guarantee that any signature will be enforceable for a particular document, transaction, or jurisdiction. E-signature and data-protection laws change frequently. Confirm the requirements for your specific document and parties, and consult a licensed lawyer in the relevant country before relying on electronic signing.
Last reviewed: June 15, 2026