Business Email Compromise: Why Real-Time Validation Is Your Best Defense
Introduction
If your company processes any payments by email—and most do—you are a target. Business email compromise (BEC) is not a new scam, but it is evolving faster than most defenses. Attackers no longer rely solely on typosquatted domains and urgent requests from “the CEO.” They now use AI-generated voice clones, deepfake video calls, and carefully researched vendor relationships to trick employees into wiring money to the wrong account.
The numbers are sobering. Since 2013, global BEC losses have exceeded $50 billion, according to FBI IC3 data. A Trustpair report published in January 2026 found that 71% of U.S. companies reported an increase in BEC attacks. Yet many organizations still treat it as an IT problem, not a process problem.
One of the most effective countermeasures is surprisingly low-tech: real-time validation. Confirming payment instructions through a separate, independent channel stops most BEC attacks cold. Here is how it works and why it matters more than ever.
How BEC attacks work
A typical BEC attack follows a pattern. The attacker gains access to an email account—often through phishing or credential stuffing—or spoofs a trusted sender’s address. They then send a message that appears to come from a vendor, a senior executive, or a business partner. The message requests an urgent payment to a new account, usually citing a change in bank details or an unexpected invoice.
Because the email looks legitimate and often contains correct context (past invoice numbers, project names, even personal greetings stolen from compromised threads), the employee processes the payment without question. By the time the real vendor asks why they haven’t been paid, the money is gone—often routed through multiple accounts and unrecoverable.
Why email security filters are not enough
Most companies rely on spam filters, DMARC, and AI-based threat detection to catch malicious emails. These tools work well for obvious phishing and malware, but BEC is different. Attackers craft messages that contain no links, no attachments, and no obvious red flags. The language mimics real correspondence. The domain might be a legitimate one that was compromised.
Even advanced AI detection struggles with BEC because the attack does not rely on a technical exploit—it relies on social engineering. An email that says “Please update vendor payment details for Acme Corp to this new account” looks like a normal business request. Filters cannot reliably distinguish it from a real one without additional context.
Deepfake technology makes it worse. Attackers can now clone a CFO’s voice from publicly available recordings and call the accounts payable team to “confirm” the change. Several recent cases have involved video calls where the attacker’s face was a synthetic replica of a known executive. Traditional security cannot catch what happens outside the inbox.
What is real-time validation?
Real-time validation means that any request to change payment instructions or initiate a new payment is confirmed through a separate, independent channel before the money moves. The key word is “separate.” If the request arrives by email, the validation must not use email. If it arrives by phone, the validation must use a different phone number—one you have on file, not the number in the signature of the suspicious email.
Banks like J.P. Morgan have promoted this approach for years. Their guidance is straightforward: call the person who supposedly sent the request using a number you already know to be correct. Ask them directly whether the payment instruction is genuine. If they are unavailable, escalate to a second person or wait until confirmation can be obtained.
This process does not require expensive software. It requires discipline.
Real-world example: J.P. Morgan’s approach
J.P. Morgan publishes regular guidance for commercial clients on fraud prevention. Their recommended flow for payment verification is:
- Do not trust any change in payment instructions that arrives by email.
- Call the requester at a known, pre-established phone number.
- If the requester is a vendor, use the contact information from your original contract, not from the email.
- For internal requests, confirm with the executive or their assistant via a separate channel (in-person or a known mobile number).
- Be especially skeptical of urgency. Attackers create a false sense of panic to bypass verification.
This method would have prevented many high-profile BEC cases. In one typical example, a company wired $1.5 million to a fraudulent account after the attacker spoofed the CEO’s email and then—when the finance team called back—answered the CEO’s actual phone (which had been forwarded to a clone device). A call to a different number would have revealed the deception.
Step-by-step guide to implement real-time validation
You can implement real-time validation in your organization today. Here is a practical sequence:
Create a payment change policy. Write a clear rule: no payment instruction change will be processed without verbal confirmation via a known, verified phone number. This applies to wire transfers, ACH updates, and vendor payment detail changes.
Maintain a verified contact list. For every vendor and internal approver, keep a phone number that was obtained outside of email. Store it in a system separate from your email contacts (e.g., in your accounting software or a shared spreadsheet with limited access).
Train employees on the process. Explain why BEC works and why verification is mandatory. Make sure they know what to say: “I need to confirm this request. I will call you back at the number we have on file.”
Add a second verification layer for high-value payments. For amounts above a threshold, require two-person approval and independent confirmation from both the requester and a second authorizer.
Test your process. Run simulated BEC scenarios. Send a fake email requesting a payment change and see if employees follow the verification process without being told it is a drill. Fix gaps you find.
Common mistakes and how to avoid them
Relying only on caller ID. Attackers can spoof phone numbers. Always call back using a number you dialed yourself, not one from a voicemail or callback request.
Assuming deepfake detection tools will save you. Deepfake detection is improving but still error-prone. A process that requires multi-channel confirmation (e.g., phone call plus a follow-up in a secure message) is more reliable than relying on any single technology.
Making exceptions for “trusted” people. BEC often exploits compromised accounts of real executives. Treat every request the same way.
Conclusion
Business email compromise is not going away. Attackers continue to refine their techniques, and traditional email security alone cannot stop them. But a simple process change—real-time validation through a separate channel—can prevent the vast majority of these frauds. It does not require a large budget or specialized tools. It requires consistency and a willingness to slow down payment processing by a few minutes.
J.P. Morgan and other major banks have been advocating this approach for years. The evidence supports it. If you run a business or handle payments, the question is not whether you can afford to implement real-time validation. It is whether you can afford not to.
Sources
- FBI Internet Crime Complaint Center (IC3), annual reports on BEC losses.
- Trustpair, “AI Fraud Outpaces Human Defenses as 71% of U.S. Companies Report Rise in Attacks,” Business Wire, January 27, 2026.
- J.P. Morgan, “How Real-Time Validation Stops Business Email Compromise” and related guidance, 2026.