My primary credit card information was stolen while I was in California last month, apparently. Someone tried to charge $500+ at a toy store in San Diego with it Tuesday, while I was using it in the Detroit area. The sale was declined, and I was notified. They did buy $40 of food at an In and Out Burger before someone at Mastercard caught on.
Am waiting for my new card to arrive. Dammit, I had finally memorized the old number!!!