Attach invoices, collect vendor forms, request missing proof. Every one is ready to run, and you can adjust it in plain language.
Attach emailed merchandise invoices to bills awaiting review.
Your reviewers find the invoice PDF on the pending bill. Your payables person sees any match that needs a decision.
Attach revised merchandise invoices to matching supplier bills.
Your pending bill carries the corrected invoice with its earlier version linked when the match is clear.