Flag changed purchases, compare promotion pay. Every one is ready to run, and you can adjust it in plain language.
Keep each bill's review card aligned with its current due date.
Your review cards show current supplier bill due dates. Reviewers can see what changed without reopening the bill.
Attach source invoices and note mismatches on bills you enter.
Your bill reviewers get the supplier invoice and any mismatches together before they decide what to approve.