California- I made a personal loan to an individual in a bind. He said he would pay me in full in 2 months, it has now been 4 months and it seems liek he has no intention to pay me. Before I lent him the money, I asked to get something as collateral. He gave me the pink slip to his car & signed a letter stating that if he did not pay me with in 2 months that I can keep his car. The problem is he did not sign the pink slip and he has posession of the car. Can I reposess his car without the pink slip being signed?