What is Second Party Fraud?

Second‑party fraud occurs when an authentic customer willingly shares their identity, account, or device with a criminal. Imagine mule accounts set up by “friends”, parents shopping on behalf of blocked minors, or legitimate users reselling access. Signals are genuine because—literally—they are. Intent is the issue.

Signals include accounts with pristine KYC and erratic behavior, frequent beneficiary changes, payouts to high‑risk corridors, and devices used across multiple profiles. Dispute claims are rehearsed or contradict each other. Refund abuse and chargebacks are associated with spikes after promotions.

Defend with explicit terms, rate‑limit beneficiary edits, and elevate high‑exposure actions like payout with identity verification. Score intent based on behavior and graph context, not just docs. Connect escalations and exits to a written AML compliance framework so off‑boarding is defensible when you discover intentional abuse.

Messy, yes. Manageable with discipline.