Why does it really matter? If your credit card number is being used by someone who shouldn't, contact your credit card company, inform them of it, they deal with the rest. They will be able to find where the card was used and all that. I would be more concerned with making sure I was not stuck with a large bill, then what Apple store they were using it in.
“If you are neutral in situations of injustice, you have chosen the side of the oppressor. If an elephant has its foot on the tail of a mouse and you say that you are neutral, the mouse will not appreciate your neutrality.” Bishop Desmond Tutu