File signed agreements, keep order receipts, bundle handoffs. Every one is ready to run, and you can adjust it in plain language.
Pair final agreement files with verified signing evidence.
Keep signed agreements ready for handoff, with signature certificates or audit trails beside them and a clear note when proof is missing.
Record approval decisions against specific proof revisions.
Keep a clear history of who approved or rejected each campaign proof, even when the review board status changes later.