Originally Posted by
Tennis69
I have had to do this on QR, CZ, and EY. Not all the flights with them but some of the flights. The gate agent does nothing except look at the card so there is no way of them knowing if the card has been canceled.
The problem is that when a card is cancelled or has expired, many people do as they're told and cut up the card and then throw away the pieces. Now one apparently one must retain the old card and carry it around for up to a year just in case it's needed in order to board a plane using a ticket that may have been purchased with that card.