I thought that too but fell on to my sword after asking friends who had similar issues, myself I would refuse to even contemplate such an action, I see and still now disagree that old card details have a valid audit trial, they are past, spent and have no compliance to an existing bank account.
I’ve always been told by my bank to cut up and destroy expired cards even when they go through the transition where you can still use the old card but it is best to use the new one.
In my experience as soon as you use the new card, the old one has no relevance and is actually a security risk.
Sorry to go on
It's the CASINOS that don't see the common sense. There have been numerous complaints, particularly from US players using those "load once and chuck" gift cards, about casinos demanding the standard front and back copies of a string of such long dead cards before they will pay out. If the player mentions that they no longer have the card because it has long since expired and destroyed, some casinos treat this as a sign that the player is attempting to get away with not submitting the required documents for some nefarious reason, so they become even more difficult about verification, rather than accepting that once a card has expired, or a one use gift card has been emptied, it is generally destroyed in accordance with the issuer's own security procedures.
Making scans prior to destruction should not really be necessary, but can torpedo those casinos that use the inability to produce images of long expired cards as an excuse to stall or get anal over verification.
The wise player always thinks ahead, learning from the misfortunes of others, and then teaching the newbies.
There are probably alternatives, such as getting a bank reference letter, or copies of old statements, but the banks charge for this. Even an image library will not protect against the casino that tells the player the image is "unclear", and to scan it again.
There has to be a valid security reason behind the banks' insistence that expired cards are securely destroyed, rather than just chucked in the bin intact, even though they will no longer work once the new card has been used and tripped the bank systems into blocking the old, even if it still has a short period of overlap validity with the new.