Deb, are you asking if someone can get a duplicate title, void a bill of sale, and take possession of a vehicle you bought and paid for? That sounds like grand theft to me, so tell this person that if this happens you will call your local law enforcement ageny and report the car stolen and where it's located.
So my answer is that the previous owner may be able to do, that but if you legally own the car why would he (or she) want to do that.
