Most payment gateways offer a card fingerprinting feature. Here’s Stripe’s: https://stripe.com/docs/api/cards/object#card_object-fingerprint https://stripe.com/

Most payment gateways offer a card fingerprinting feature. Here’s Stripe’s: https://stripe.com/docs/api/cards/object#card_object-fingerprint https://stripe.com/docs/api/cards/object#card_object-fingerp.... It’s fine with PCI DSS as long as it is not reversible.