Are e-signatures and DocuSign legal in Mexico? (2026)

Short answer: yes, for many commercial transactions. Mexico's Código de Comercio recognizes electronic signatures and says they cannot be denied legal effect merely because they are electronic. The result still depends on the signing method, the evidence, and any special formality that applies to the transaction.

Legal sources last reviewed July 29, 2026.

What Mexican law says

The current Código de Comercio is the main source for private commercial transactions:

• Article 89 defines an electronic signature as electronic data associated with a data message that identifies the signer and indicates approval. It gives that signature the same legal effects as an autograph and makes it admissible as evidence.
• Article 93 lets a data message satisfy writing and signature requirements when the information remains integral and accessible and is attributable to the parties.
• Article 96 prevents a signing technology from being rejected as a category.
• Article 97 asks whether the method is appropriate for its purpose and defines the stricter requirements for an advanced or reliable electronic signature.
• Article 114 supports cross-border recognition based on equivalent reliability rather than the country where the platform, provider, or signer is located.

That framework makes the law technology-neutral. It does not name or approve a particular commercial platform.

Is DocuSign legal in Mexico?

DocuSign is not automatically valid or invalid because of its brand or US origin. The same is true of SignQuick and other foreign platforms.

For an ordinary private commercial contract, the practical questions are whether the process:

• identifies the signer;
• records that person's approval;
• links the signature to the agreed document;
• preserves reliable evidence of attribution and integrity; and
• satisfies any special rule for that transaction.

US ESIGN/UETA compliance may be relevant to a US party, but it is not the Mexican legal test and does not guarantee enforceability in Mexico.

Is a scanned signature valid in Mexico?

A scanned, pasted, typed, or drawn signature can be electronic data associated with a contract. It may qualify as an electronic signature when the complete process identifies the signer and proves approval.

The image alone is easy to copy, so it usually provides weaker evidence than an authenticated signing flow. A stronger record includes consent, identity checks, timestamps, document hashes, delivery records, and an audit trail. A reusable image by itself will not normally establish Article 97's exclusive-control and tamper-detection requirements for an advanced or reliable signature.

Electronic signature, advanced signature, and e.firma

Mexican commercial law has a broad category and a higher-assurance subset:

• Electronic signature — the broad Article 89 category. “Simple electronic signature” is common shorthand, not a separate term defined by the Code.
• Advanced or reliable electronic signature — an electronic signature meeting Article 97's four tests: exclusive correspondence to the signer, exclusive control of creation data, detectable alteration of the signature, and detectable alteration of the signed information.

SAT e.firma is an advanced electronic signature, not a third legal tier. It is used when tax, administrative, corporate, or another special rule calls for it. The SAT also supports private-sector uses, so it is not exclusively a tax credential.

The federal Ley de Firma Electrónica Avanzada principally governs specified federal administrative activity. Its Article 4 sends commercial acts back to the Código de Comercio.

Does NOM-151 make a signature valid?

Not by itself. NOM-151-SCFI-2016 governs the preservation of data messages and digitization of commercial records.

The distinction matters:

• a commercial contract may be formed electronically without first obtaining a NOM-151 conservation certificate;
• merchants have a separate duty under Articles 46 and 49 of the Código de Comercio to preserve qualifying business and contract records for at least ten years; and
• a generic RFC 3161 timestamp is not automatically a Mexican NOM-151 certificate issued through an accredited preservation process.

Check the official certification-service-provider directory before relying on a provider's Mexican accreditation claim.

Which contracts can usually be signed electronically?

Ordinary private agreements that do not have a special statutory form are the clearest fit—for example, many service agreements, NDAs, software licenses, statements of work, purchase orders, and other B2B contracts.

Electronic signing does not remove a separate requirement for a public instrument, notary or other fedatario, witness or ratification, registration, or a government-specific signature system. Real-estate transactions, wills, powers, corporate acts, employment documents, tax filings, and negotiable instruments can involve federal, state, or sector-specific rules. Check the particular transaction instead of relying on a blanket list.

What evidence should you keep?

For a private commercial agreement, retain:

• the final document and a reliable integrity hash;
• the signer's identity and authentication evidence;
• an explicit record of approval or intent;
• timestamps, delivery records, IP and user-agent evidence where lawful and proportionate;
• the complete audit trail; and
• the version of the agreement and signing disclosure shown to the signer.

SignQuick records consent, signer activity, timestamps, IP and user-agent evidence, SHA-256 document hashes, and an audit-trail PDF. It also records the status of its third-party RFC 3161 timestamp request. Those records can support a Mexican attribution and integrity analysis, but they do not turn every transaction into an advanced signature, SAT e.firma, or NOM-151 conservation certificate.

Try the workflow before creating an account

You can try signing a PDF in the browser without creating an account or uploading it to SignQuick's servers. When you are ready to send a document to another person, create a free account.

Related guides

• What is an electronic signature? — the practical difference between electronic and digital signatures
• Is e-signature legal in Colombia? — Ley 527 and the current Decreto 1074 framework
• Is e-signature legal in Argentina? — Ley 25.506 and the electronic/digital distinction

This article is general information, not legal advice. A Mexican attorney should review high-value, regulated, disputed, notarial, or state-law transactions.