What should organisations do when a fraudulent payment request reaches finance or sales?

Why separate validation is the right control boundary

A fraudulent payment request is a process integrity problem, not just a judgment problem. The safe response is to break the normal approval path and verify the request through an independent channel before any transfer, shipment, or account change is executed. That extra step is what prevents a convincing message from becoming an irreversible business action.

The practical test is whether the request can be confirmed without relying on the same email thread, invoice, or chat that carried the fraud attempt. If the answer is no, the workflow should stay paused. A separate validation path creates an intentional delay that gives finance or sales time to compare details against known records and reduce the chance of acting on impersonation or account compromise.

What finance and sales should verify before acting

Teams should confirm the requester using a trusted number, internal directory, or other pre-established contact method, then compare the sender domain, reply path, and account history with known records. The key question is whether the request matches the normal relationship pattern for that customer, supplier, or internal approver. If the request is unusual, the default should be to stop and revalidate rather than interpret intent from the message.

This check is strongest when it looks for mismatches in multiple places at once: unfamiliar bank details, urgency language, a changed mailbox, a new shipping destination, or an approval that arrives outside the usual process. Those signals do not prove fraud on their own, but they are enough to require containment until a real owner reviews the anomaly.

Where a payment or shipment is time-sensitive, the organisation should define who can approve exceptions and how those exceptions are documented. The point is not to make every request slow, but to ensure that anything capable of moving money or goods has a second, independent confirmation step when the request departs from normal patterns.

Why the anomaly review has to stop the workflow, not just inform it

Fraud succeeds when speed outruns verification. Once a finance user releases funds or a sales team ships goods, the organisation may have very limited recovery options, especially if the request came from a spoofed domain, a compromised mailbox, or a realistic impersonation of a trusted contact. The pause is therefore a control, not an inconvenience.

The most common failure is treating the suspicious request as something to investigate after the transaction is complete. That reverses the order of protection. A message can be researched later, but the business action itself should not proceed until the approval owner has reviewed the anomaly and the verification path has been completed.

Risk and Threat Considerations

Fraudulent payment requests are designed to exploit trust, urgency, and routine approval habits. The main risk is not only financial loss, but also false authority being accepted as normal and then reused for additional payments, shipments, or account changes.

Failure mechanism: The attacker or impersonator uses a convincing email, forged domain, or compromised account to create a request that looks internally consistent enough to bypass ordinary review, while the real requester is never independently confirmed.

Impact: Money can be transferred, goods can be shipped, and the false relationship can persist long enough to trigger repeated losses or downstream disputes before the organisation detects the deception.

Practitioner Guidance

What to prioritise: Put the independent verification step before any release authority, not after it. If the request changes payment instructions, delivery details, or approval routing, require an out-of-band confirmation from a known contact method.

What to verify: Confirm the requester’s identity against a trusted directory or stored callback number, then verify the domain, account age, and historical request pattern. If those items do not line up cleanly, treat the request as untrusted until reviewed by the approval owner or another delegated exception approver.

Common mistake: Letting the content of the email persuade staff that the request is legitimate. A polished message can be fabricated quickly; the control objective is to validate the business relationship and the authorization path, not to debate the tone of the message.

Practitioner takeaway: For payment and fulfilment requests, the safest decision rule is simple: no independent confirmation, no movement of money or goods.

Related resources from NHI Mgmt Group

• How should security teams detect supply chain compromise in email before a fraudulent payment request reaches the inbox?
• Who is accountable when a payment is redirected through a fraudulent email request?
• What are the signs that a vendor payment request may be fraudulent?
• What should organisations do when vendor email compromise targets finance, sales, and project teams at the same time?