namewitheldto
namewitheldto
namewitheldto

try scanning your card while it’s in the metal cardholder

Instead of a “nasty message” which, the crook will not waste any more time or resources on why not invent a false personna complete with a legitimate looking card number that he will waste time trying to use.

Making a scanner more robust than what your employer or your local retailer is using is not very difficult. ASS-U-ME-ing that crooks can’t do it is not very difficult, not very smart either.