Check purchase facts, compare invoices, request missing proof. Every one is ready to run, and you can adjust it in plain language.
Call out a changed proof before you confirm the creative decision.
Keep reviewers aware of changes to a proof before they act on a decision. Your task shows the mismatch and asks for confirmation.
Bring the latest campaign proof back to your review task.
Your reviewer gets a task ready to review, with the replacement proof and its version named in a comment.