Logging and preservation of signature logs

Logging in the context of electronic signature designates the immutable recording of all events in a document''s lifecycle: creation, sending, opening, OTP verified, signature affixed, signed document download, archiving. These logs constitute the technical layer of the audit trail and may be required in case of dispute. Legal requirements vary: GDPR imposes a limit on the retention period of personal data, while statutory limitation periods for contracts (5 years in commercial law, 10 years for civil acts) define the minimum log retention duration. Best practice: logs must be cryptographically signed (integrity token) to prove they have not been altered. Certyneo preserves the logs of each envelope for the applicable legal duration and includes them in the downloadable digital safe.