I discovered an unauthorized electronic debit for 10$ from my checking account. I have to now go through the lengthy process of disputing it with my bank and possibly having to close my account and get new cards, etc.
The only place that I can recall using my card info on the net was when I was going to rent a car at Hertz's web site. There was a reservation reward popup that I thought was Hertz's. Apparently I am mistaken and I am in the process of notifying Hertz about it.
BEWARE about reservation reward pop ups when renting a car