when my sister had her credit card stolen it was definitely not a mustachian, but prob part of a ring.
We were shopping that day, and she purchased something at a department store and we were chatting the whole time, probably distracted. Then walked out to the car. When she went to fill up her car at the gas station and freaked that she didn't have her card (debit type card). My sister can be a bit of a space cadet so I suggested maybe she didn't bring it with her. That's when she then realized the last time she used it was at the department store, and the salesperson didn't give her card back.
She called the card people 30 minutes from the time she lost it, and the people had already hit 2 of the stores in the mall including a sports shoe store and racked up hundreds of dollars. Crazy.