Gather review files, compare deal terms, return incomplete forms. 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.
Keep incomplete requests waiting and alert requesters.
Your requesters know what to add to their original purchase forms, while the approval waits for a reviewer.