Blocking policy

Fraud-risk score block threshold: 75%

This case study models 10,000 transactions, each with a fraud-risk score. Transactions above the threshold are blocked in real time before completing. Blocking a legitimate transaction, a false positive, creates friction and can drive a customer to a competitor; letting fraud through creates a direct financial loss.

Outcome

Fraud blocked—

Legitimate transactions blocked—

Net financial outcome—

Transactions by fraud-risk score (red = blocked, gold ring = true fraud)