yup. we had some test cards around the lab, in which the keys were all 'A5A5A5...' or '1234567...', which are therefore worthless outside the lab.

but it's going to be a problem, if you do not have a business relationship with the card vendor --

at one time, I could look at the pattern in the little gold contacts and tell you who the manufacturer was, but I've forgotten most of what I ever knew about them.