From the moment a supplier invoice arrives to the moment it is paid, with the bad ones caught in between.
Vendor, amount, terms and due date read from every invoice the moment it arrives, then checked against history before anything is booked.
A clean vendor list for each client: terms, history, documents, and a watchful eye on price increases.
Approval chains that move by themselves, and payment runs prepared on each client's schedule for a final human look.

A thirty-minute live walkthrough. No prep needed, just your questions.