Attach invoices, collect vendor forms, request missing proof. Every one is ready to run, and you can adjust it in plain language.
Your reviewers get the vendor packet beside high-value purchase requests, or a clear list of what's missing before they decide.
Your requesters know what to add to their original purchase forms, while the approval waits for a reviewer.
Your requester knows exactly what to add, and your approver can see why the bill is waiting.
Your finance reviewer can see the current budget balance beside a purchase request, without hunting through a separate sheet.