The bank normally won't do it. They refer you to the credit card company. But even then, some purchases don't trace back beyond the corporate processing center. We found this out a couple of years ago when we had to deal with some questionable purchases. The company where the purchase was made didn't care whether the transaction was fraudulent; it was cheaper for them to write it off than to track it down. I'm there, "I don't know whether that was us or not. I don't have enough information to recognize it," and the helpful lady on the other end said, "That's fine, we'll cancel it and refund to your card."
I don't know whether they would have the ability to track down to further detail under subpoena or search warrant. They must. But I don't know whether they'd do it for what's basically a fishing expedition.
I think it'd be a legitimate part of a missing-persons investigation. All they'd need is to show a judge where the details were important. IF they've developed any hint of a crime, it'd be a no-brainer.
Don't forget the point-of-sale (



Not all transactions are via credit card, and stores do have a deep database of past sales. The clerk (or even manager) may not have access to it .... but a good IT person could easily go in and find a matching-dollar transaction for the specific time period.
It's just that they wouldn't want to, unless forced into it. (I've programmed customized


