A customer pays by tapping a phone or watch, then returns a week later with the physical card. Your POS receipt shows one set of last four digits, the customer points to a different set on the card, and the processor dashboard may display yet another payment reference. That situation...
Card Account Updater (Visa VAU / Mastercard ABU): How Reissued Cards Break Recurring Billing
Recurring billing depends on something customers rarely think about: the payment credential saved when they first subscribed. That credential may work for months or years, but cards do not remain unchanged forever. They expire, are replaced after fraud, are reissued after being lost or stolen, and sometimes receive entirely new...