The evidentiary value of an electronic signature depends on the ability to demonstrate, before a judge, two elements: certain identification of the signatory and document integrity (article 1366 of the Civil Code).
Certyneo delivers for each signature an audit certificate embedded in the PDF, which compiles all technical evidence:
- Signatory identity (email address, phone number verified by dual-channel OTP)
- Qualified timestamp of each action (view, signature, refusal)
- SHA-256 cryptographic fingerprint of the document, which demonstrates that it has not been modified since signature
- IP address and approximate geolocation of the signatory at the time of signature
- Detailed log of views, reminders and actions on the envelope
This body of evidence is recognised by French case law (Cass. civ. 1st, 6 April 2016; Cass. com., 13 March 2019) and European case law. For documents benefiting from countersignature by a solicitor (electronic solicitor document), evidentiary force is further strengthened — the client is relieved of any handwritten notation.