Hold possible duplicate invoices, link repeat quotes, check purchase forms. Every one is ready to run, and you can adjust it in plain language.
Hold the original bill when a supplier sends a corrected copy.
Your AP clerk sees the earlier bill on hold, with the supplier's correction and changed fields ready for review.
Put the needed action and tomorrow's due date on flagged client tasks.
See your next steps in the flagged-email task list, with action notes and due dates for tomorrow.