Stripe Radar Fraud Detection

Stripe Radar is a payment-fraud product integrated with Stripe’s payment objects. Stripe says its adaptive model evaluates payment risk in real time using transaction signals and feedback. Businesses can use rules to take different actions, including allowing or blocking an object, requesting 3-D Secure authentication or placing an eligible payment in review. Which actions apply depends on the object, account configuration and product plan. Radar for Fraud Teams provides additional risk insights and scores; do not assume every Radar user has the same features.

A risk score estimates likelihood, not certainty. Stripe notes that normal-risk payments can still become fraudulent, and a high-risk block may be a legitimate attempt. Merchants remain responsible for the business decision to fulfill, review or block. A human review is a queue for further investigation, not proof that the customer is fraudulent. Reviewers can use available transaction context, contact the customer through a trusted channel and record what evidence changed the outcome.

Before changing rules, test behavior with Stripe’s test cards and the specific payment flows used by the business. Measure outcomes with confirmed labels and compare fraud losses, dispute rates, review workload and legitimate payments blocked. Keep an allow-list decision scoped and documented. Do not promise that Radar will eliminate fraud or guarantee approval; issuer authorization, authentication and merchant risk decisions are separate stages.