Can you report a car stolen if the person you had a rental contract with has not paid or returned the car and you do not know where their located?

Yes, you can report the car stolen. This is technically called a "Conversion", which means the car was converted to a stolen status because it was kept longer than the contract allowed. I would wait at least a week, and try several methods of contacting the renter before notifying the police. It is unlikely that your car will be returned quickly by reporting it stolen. The real power is in the threat of reporting it. This is usually enough to scare the renter into promptly returning the vehicle. Tell them that it will be considered a felony if you report the car stolen and they are caught. Of course, this assumes you can get ahold of them to deliver the threat. Answer provided by:

Sensible Car Rental San Diego

http://sensible-car-rental.com