A relative of mine agreed to obtain a car loan through their credit union for me with a very low interest rate. I put a $2500.00 down payment on this new car and paid $600.00 GAP insurance, however, the loan was in their name. They eventually added my name to the DMV registration record. During the time I had possession of the car (1.5 yrs) I was the only one who drove it and paid for all the maintanence and upkeep on the car. After recently being assaulted by this person, I thought it best to sever all ties so I returned the car with a letter requesting the return of the downpayment. Do I have any legal basis for suing if the downpayment is not returned?