Module 9: Payment Security and Fraud Prevention

Where does the money actually leak out of a payments stack, and who pays for it?

Every payment system covered in this course was designed to move money efficiently. Fraudsters have built parallel systems designed to intercept it. This module is the operator's view of payment security: the attack surfaces that matter, the controls that work, and the liability structure that decides who eats the loss when something goes wrong.

What you'll learn in this module

• The fraud taxonomy that matters in 2026: card-not-present, account-takeover, authorized-push-payment (APP), synthetic identity, business email compromise
• How 3-D Secure, PSD2 SCA, network tokenization, and device-binding actually move liability, and where each fails
• Where machine learning genuinely helps fraud detection and where it produces theatre
• The PCI DSS and PCI 4.0 control surface, and what level-1 versus level-4 actually requires of a merchant operationally
• Why APP fraud is the fastest-growing loss category on real-time rails, and what the UK reimbursement regime signals for the U.S.

The full module gives finance and risk leaders a defensible operating posture across the major fraud categories without reaching for vendor-marketing language.