AP controls

Accounts payable fraud prevention controls

AP fraud prevention is not one tool. It is a control stack: vendor onboarding, PO match, payment history, callback, dual approval, evidence preservation, and training.

ScamSpot Business helps with the first read, but the real protection comes from making verification mandatory before money moves.

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Quick answer

Make safe behavior the default

The goal is not to make AP suspicious of every vendor. The goal is to make payment-change verification routine, documented, and impossible to bypass quietly.

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Turn this check into an AP policy

Get the vendor bank-change policy, callback script, approval note, incident checklist, and hold triggers for your finance team.

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Core controls

These controls fit small teams without requiring a large security program.

  • Vendor master file with trusted phone numbers and approved payment rails.
  • PO or purchase approval match before payment.
  • Callback on known number for every payment-instruction change.
  • Dual approval for wires, new vendors, and bank changes.
  • Hold queue for urgent or unusual requests.

Training triggers

Teach AP and operations teams to escalate these immediately.

  • Urgency, secrecy, or executive pressure.
  • Free-mail finance contact.
  • Reply-to mismatch.
  • New bank country or payment method.
  • Attachments with changed payment details.

What to measure

Simple metrics make controls real.

  • Bank-change requests reviewed.
  • Callbacks completed and documented.
  • Payments held due to red flags.
  • Confirmed incidents reported.
  • Training refresh completion.

AP Fraud Prevention FAQ

What is the highest-impact AP control?

A callback on a known vendor phone number before any bank-detail or payment-instruction change.

Do small businesses need dual approval?

Yes, especially for wires, new vendors, and payment changes. Dual approval can be lightweight but should be documented.