Balance Fraud Control with User Experience

# Balance Fraud Control with User Experience Design a strategy to balance fraud control with improving the experience of legitimate users. Explain how you would choose actions for different risk levels, evaluate the trade-off, and detect when the strategy is causing avoidable friction. No particular fraud type or enforcement policy is specified, so state the context you would clarify. ### What a Strong Answer Covers - A clear threat, decision unit, and harm model before selecting interventions. - Risk-based actions with escalation or appeal for uncertain cases. - Joint fraud and legitimate-user outcome metrics rather than a single rejection rate. - Evaluation that accounts for delayed labels, selective verification, and adaptive attackers. ```hint Use more than two actions Consider the trade-off between allowing, asking for additional verification, and blocking. ``` ### Follow-up Questions - When could a lower observed fraud rate be misleading? - How would you assess the cost of mistakenly challenging a legitimate user?