The evidentiary value of an electronic signature depends on the ability to demonstrate to a judge two elements: certain identification of the signer and document integrity (Article 1366 of the Civil Code).
Certyneo delivers for each signature an audit certificate embedded in the PDF, which consolidates all technical evidence:
- Signer identity (email address, telephone number verified by dual-channel OTP)
- Qualified timestamp of each action (viewing, signature, refusal)
- SHA-256 cryptographic fingerprint of the document, which proves it has not been modified since signing
- IP address and rough geolocation of the signer at the time of signature
- Detailed log of viewings, reminders, and actions on the envelope
This body of evidence is recognised by French jurisprudence (Cass. civ. 1st, 6 April 2016; Cass. com., 13 March 2019) and European case law. For documents countersigned by an attorney (electronic attorney deed), the evidentiary value is further strengthened — the client is exempt from any handwritten notation.