Generate and preserve an audit trail and evidence package for a signed contract

Steps

1. At each stage of the signing workflow, capture and log: timestamp (UTC, from a trusted time source), actor identity (email, IP address, user-agent), action performed (viewed, signed, declined), and a SHA-256 hash of the document version at that point.
2. Bundle the evidence package on completion: original unsigned document, signed document, certificate of completion, event log, IP addresses, device fingerprints, and the signing platform's audit trail export.
3. Store the evidence package in write-once (WORM) or immutable storage; use object storage with versioning and Object Lock (e.g., AWS S3 Object Lock in COMPLIANCE mode) to prevent deletion.
4. Apply a trusted timestamp to the final signed document bundle using a TSA (Time-Stamp Authority) compliant with RFC 3161 to provide independently verifiable proof of signing time.
5. Index the evidence package in your CLM linked to the contract record; ensure it is retrievable within your litigation hold SLA.
6. Test the evidence package for completeness annually or after any platform change by having legal counsel review a sample for admissibility.