[akamia]

Even in the early 2000s this was a thing in some places. I remember working at a store that printed the full CC# on the customer's receipt. As an employee, it would've been ridiculously easy to steal credit card information. You could just print a second copy of the receipt after the customer left.

[mtnGoat]

This was especially workable in small towns, even back then you still need the zip code to pass validation, which small towns usually only have one of.