Comment by B1FIDO

I've got a crazy bizarre idea. Why don't you contact Amazon customer service and ask them about it?

You can describe the cards and give them the numbers and then tell them why you believe they've been tampered.

I mean it's totally illogical, right?

When I was accused of possessing counterfeit money, I went right to my bank and showed the bills to them (they were, of course, authentic).