Notes on invoice review
Accounts payable audit: process, checklist and controls
What an AP audit is, how internal, external and recovery audits differ, the audit process step by step, and a checklist you can run between audits.
Duplicate payments: causes, how to find and recover them
What a duplicate payment is, why AP teams pay the same invoice twice, how to find one in your payment history, and how to get the money back from the vendor.
Double billing: what it means and what to do
Double billing is when a vendor invoices you twice for the same goods or work. How it happens, how to spot it, and how to ask for a credit.
Invoice price variance: formula, examples and causes
What invoice price variance is, how to calculate it, how it differs from purchase price variance, and how to check prices when there is no purchase order.
Invoice discrepancy: common types and how to resolve one
What an invoice discrepancy is, the common types, a checklist for verifying invoices before approval, and steps and a vendor email template to resolve one.
How to find duplicate invoices in Excel (with formulas)
COUNTIFS formulas for exact and near duplicate invoices in an AP export, plus XLOOKUP for checking new invoices against payment history.
Invoice fraud: warning signs AP teams can check
What invoice fraud is, the common schemes, warning signs AP staff can check, controls that reduce the risk, and what to do if you suspect it.