Finance · Payment fraud · Released October 2026

The Beneficiary Has Changed by Kai London

Finance teams are on the front line of cyber fraud: changed bank details, fake supplier invoices, urgent CEO requests and now deepfake calls. This playbook gives finance leaders the controls, checks and response steps that stop money leaving the business.

What the book covers

How payment fraud works

Business email compromise, invoice fraud and payment diversion explained.

Supplier bank detail changes

Verification processes that defeat the most common attack.

Approval controls

Segregation of duties, dual authorisation and payment limits.

Executive impersonation

Handling urgent requests, including voice and video deepfakes.

Working with security

Email, identity and monitoring controls finance should ask for.

When money goes

Recovery steps in the first hours, banks, insurers and reporting.

This book offers general guidance and is not legal advice. It is independent and carries no endorsement by or affiliation with any regulator or standards body.

Payment fraudBECFinance controlsDeepfakes

Who it is for

CFOs, financial controllers, accounts payable and treasury teams, and auditors reviewing payment controls.

About the author

Professor Kai London — CISSP, CISM.

An internationally recognised cybersecurity executive, board advisor and Founder & CEO of Quantum AI Systems Security LLC, writing at the convergence of AI, governance and operational resilience. Honorary Professor and Researcher at UCL.