Request missing approval evidence, route requests to reviewers. Every one is ready to run, and you can adjust it in plain language.
Send approved supplier agreements for signature and update the buyer.
Your signer gets a private link to sign the agreement. Your coworker gets a separate link to view the request.
Flag incomplete purchase requests and ask for missing proof.
Your requesters know what to add to their original purchase forms, while the approval waits for a reviewer.