It was an international charge, which put me on red alert when I got the email about the charge.
I have all charges sent to my email and text accounts, and I get them within seconds. Caught fraudulent transactions four or five times that way.
When you do sell the car - PULL THE PLATES.
Or notify your DMV immediately. Whatever your state allows to relieve you of liability.
I trusted a nice couple who bought a car of mine. I then got toll bills for over a year. After the first toll bill, I did send the state a notice of the sale. But the damage was done.
I never paid the toll bills of course. They ran up only $500 in unpaid bills. I got a call one time from a collection agency making veiled threats. I told them to go pick up the car. Never heard another word from then again.
Since the buyer never registered the car it was still legally mine. I thought about hunting it down and taking it back. But that would probably backfire on me.