Check requests, surface missing proof, chase decisions. Every one is ready to run, and you can adjust it in plain language.
Keep contract requests missing a W-9 out of the approval queue.
Your requesters get a clear W-9 correction email. Their contract tasks wait in your needs-documents section with a comment.
Reopen approval when signed-off supplier terms change before execution.
Your contract manager gets a fresh approval review for changed terms, with the earlier decision linked and signing on hold.