fraud

Payments engineering is mostly failure engineering. This lesson covers the decline taxonomy and what a merchant may do about each kind, how strong customer authentication and 3-D Secure actually work including the exemptions with their 0.13 and 0.06 percent fraud thresholds, who eats a fraudulent transaction and when that liability shifts, and the chargeback machine from dispute to representment.

If recognition no longer establishes identity, verification has to move to the channel. This lesson builds the practice: out-of-band confirmation, which requests need it, designing protocols people will actually follow under pressure, the household version, and what to do in the first hour after something goes wrong.

Security awareness training taught people to spot bad grammar, odd domains and generic greetings. Those signals are gone. This lesson covers what generative tools changed about attacks, what they did not change, and why detection-based defence was always the weaker half.

Assistants sit where authority, access and urgency meet, which is exactly what impersonation fraud exploits. This lesson covers why the role is targeted, what changed when voice and video became cheap to fake, and the verification habits that hold up when a convincing executive is asking you to move quickly.