Are electronic signatures legal? What you need to know

Yes: electronic signatures are legal and legally valid in virtually every Spanish-speaking country, as well as the United States. The most common question isn't whether they're legal, but what requirements they must meet to carry full evidentiary value.

Each country has its own law. Mexico has recognized them since the 2003 Commercial Code reform; Colombia under Law 527 of 1999; Argentina under Law 25,506; Chile under Law 19,799; and Spain under the European eIDAS Regulation. In the United States, the ESIGN Act and UETA give them validity across all 50 states.

Although the names change, they all share one principle: a document cannot be rejected as evidence solely because it was signed electronically.

Electronic signatures are recognized by law across the region: Mexico, Colombia, Argentina, Chile, Peru, Ecuador, Guatemala, Costa Rica, Bolivia, Paraguay, Uruguay, Panama, the Dominican Republic, Nicaragua, Venezuela, El Salvador and Honduras. Also in Spain — under the European eIDAS framework — and in the United States and Puerto Rico, through the ESIGN Act and UETA.

Some countries distinguish between a simple electronic signature and a certified or advanced one: the former is valid for most private agreements, while certain official procedures may require the certified version.

Three elements are key: the signature must be attributable to a person, the document must be kept intact, and there must be a record of the process. That record — known as an audit trail — usually includes the date and time, IP address, device and some identity-verification method.

Firmiu generates that trail automatically on every signature, so the document is backed if it is ever challenged.

Signing electronically is legal, secure and increasingly common. To see the details for your country, check our legal-validity-by-country guide.