> don’t tell anyone their expired card will work The expiration date is stored on the card, so expired cards wouldn't work. Revoked cards (eg. ones replaced by

> don’t tell anyone their expired card will work The expiration date is stored on the card, so expired cards wouldn't work. Revoked cards (eg. ones replaced by the bank) would, though. Keep in mind that the merchant sets terminal limits for what transactions are allowed to be processed offline, so one might be able to get a burger without connectivity, but not a new TV.