Invoice checking guides

Short references for people who need to verify a supplier invoice, find discrepancies, or decide what to check before paying. Each guide can stand alone; the invoice checker is there when you want a document comparison.

• How to check an invoice for errors before paying

  A practical review order: identity, line items, tax, totals, then the supporting quote or purchase order.

• Invoice vs purchase order: what should match

  What two-way invoice matching checks, where three-way matching is different, and how to compare an invoice with a PO.

• Common invoice errors businesses miss

  Wrong quantities and prices, tax on a bad base, duplicate charges, missing discounts, and other discrepancies to catch before payment.

• Three-way invoice matching: PO, receipt and invoice explained

  How accounts payable compares order, receipt, and invoice — and how that differs from a two-document check.