File signed agreements, keep order receipts, bundle handoffs. Every one is ready to run, and you can adjust it in plain language.
Hold bills already paid in the books before the payment run.
Your AP clerk sees a bill on hold, with the paid accounting entry linked for review before another payment starts.
Deny ACH requests that match supplier bills already paid in your books.
See likely repeat supplier payments stopped before release, with the paid bill behind each denial ready for your review.