“They caught duplicate freight invoices we had already approved once. The reservation I still have is that their sample size on small vendors felt thin — but the high-value findings paid for the engagement.”
Evidence
What AP teams say after the findings pack
Comments below refer to specific engagements — matching samples, hold clear-downs, and recovery reviews — not generic praise.
“We handed them 120 aged holds five days before close. By Wednesday we had a ranked list with owners. Two price mismatches still needed buyer sign-off, yet the rest of the queue moved.”
“The walkthrough used our own rejected invoices, which embarrassed a few buyers in a useful way. Clerks now refuse tax invoices missing the PO reference instead of parking them for later.”
“Cheng-Han’s duplicate scan found three near-matches we had missed because amounts differed by a rounding line. Recovery from one vendor took six weeks, so plan for follow-up time after the review.”
“On-site day in our Banqiao warehouse office was messy — paper folders everywhere — and they still finished the sample. I would have preferred more advance notice on which binders to pull.”
Extended story: trading company, two entities
A Taipei trading group asked for a full invoice compliance audit across two entities after VAT queries slowed payment runs. We sampled 180 invoices from a single month, focusing on import-related vendors and domestic service suppliers.
Findings clustered around three issues: service invoices booked without PO references, GUI numbers that no longer matched the vendor master after a company rename, and freight bills posted twice under slightly different descriptions. AP cleared the GUI mismatches within a week; freight recovery required treasury follow-up.
The controller later commissioned a shorter pre-close clear-down the following quarter rather than another full population sample — a pattern we see when the first engagement surfaces process gaps that the team can own.