If an invoice-check sample produces the wrong total, stop payment or automated approval until the discrepancy is explained. Compare line items, quantities, unit prices, tax, credits, currency, and the underlying order or contract. Recalculate the total independently and record the exact field where the values diverge.
Check whether the invoice is from an approved vendor and whether payment details have changed. Verify unusual requests using a trusted contact method, not a phone number or link in the suspicious invoice. Test the corrected rule on another invoice before resuming a batch. Preserve the original document and review record so an adjustment cannot erase the evidence behind the decision. FTC guidance emphasizes clear invoice-approval procedures and close review.
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