Are electronic signatures legal in Costa Rica?

Ley 8454

The Law on Certificates, Digital Signatures and Electronic Documents (Ley 8454 of August 30, 2005) took effect on its publication in La Gaceta on October 13, 2005. Its core rules:

• Functional equivalence (art. 3). Any statement expressed or transmitted electronically is legally equivalent to a physical document, but using an electronic medium never waives the formalities the law requires for a particular act.
• Evidence (art. 4). Electronic documents are classed as public or private and carry the same evidentiary force as physical ones.
• Contracts (art. 5(a)). Electronic documents are expressly valid for forming, formalizing and performing contracts.

Digital and certified digital signatures

Costa Rica's law uses "firma digital" in a technology-neutral way. Article 8 defines it as any data attached to or logically associated with an electronic document that lets you verify the document's integrity and identify the author uniquely, binding them to the document. A digital signature is certified when it's issued under a valid certificate from a registered certifier.

• Documents signed with a digital signature have the same value and evidentiary effect as their handwritten equivalent, and any law requiring a signature accepts either (art. 9).
• Electronic public documents must carry a certified digital signature (art. 9).
• A document tied to a certified digital signature is presumed, unless proven otherwise, to be the work and responsibility of the certificate holder (art. 10).

Certifiers are registered and supervised by the Dirección de Certificadores de Firma Digital, part of the Ministry of Science, Innovation, Technology and Telecommunications (MICITT).

What can't be done electronically

Article 5, as rewritten by the 2019 Family Procedure Code and a later amendment, says these can't be recorded in electronic documents:

• Acts or transactions for which the law makes physical form essential.
• Dispositions on death, such as wills, apart from narrow exceptions in the securities market and insurance contract laws.
• Non-judicial acts and agreements relating to family law.
• Highly personal acts (actos personalísimos) in general.

On the other side of the ledger, article 5 allows electronic notarial protocols, including the parties' consent and signatures, and electronic filing with the National Registry.

Where SignMaster fits in Costa Rica

SignMaster provides electronic signatures with an audit trail, not certified digital signatures from a registered certifier, so it can't sign public documents or claim the article 10 presumption. Whether its signatures meet article 8's definition in a given case is a question for a Costa Rican lawyer. For private contracts, the record is what you'd rely on: each completed PDF ends with a certificate of completion showing every signer's email, IP address, consent and timestamps, and a SHA-256 fingerprint lets anyone check the file is intact.