That happened to a buddy of mine a couple of years ago, he sold his nissan car to a guy that I guess never registered the car in his own name, the car was found abandoned on the freeway in the next state, the towing company found the last owner which was my friend and said that he was responsible for the bill even though my buddy still had the bill of sale for when he sold it!! Long story short since he never went to the DMV within the 30 days after he sold it to tell them that the car was no longer his, that he was still the owner and responsible party for the car! Cost him $400 to get the car from the tow company and he later sold the car for another $2000 (he originally sold it for $2600). This will work out for ya if it isn't totaled or damaged too badly, you will get to sell it again, a 2 for 1!!