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