alt Hacker NewsExcept the banks have "helpfully" provided a service to merchants to tell them, "this card has expired, here is the new number to charge" (or expiry/CVV).
I remember getting into an argument with a bank teller about me wanting to block/dispute transactions and how they kept approving transactions. "But you have an agreement with the gym..." That's between me and the gym, not for you to facilitate on their behalf.
Obnoxiously that doesn't cover all the edge cases for consumers. Payments from my watch recently started failing with a generic "declined" error. After calling my bank I worked out that my credit card had been replaced some months ago in advance of a recent expiry - I updated my phone wallet at the time, but my watch's wallet didn't give any indication that it was trying to use an expired card.