Credit card companies run sophisticated anti-fraud operations in real time. Visa "analyzes more than 500 unique risk attributes" the moment you attempt to make

Credit card companies run sophisticated anti-fraud operations in real time. Visa "analyzes more than 500 unique risk attributes" the moment you attempt to make a purchase with a card. They make decisions in milliseconds on each purchase to determine whether it might be fraud. This includes looking at past purchase history to see if this transaction is unusual.[1] [1] https://usa.visa.com/visa-everywhere/security/outsmarting-fraudsters-with-advanced-analytics.html https://usa.visa.com/visa-everywhere/security/outsmarting-fr...