I bought a vehicle for myself. My son was in need of a vehicle and I allowed him the use of the car if he paid all expenses. The car was registered in his name and he paid the expenses. He was married a few years later and the car is still registered in his name. He and his wife have separated. Can I go and personally take the vehicle? I have my son's permission. I want to make sure that my retrieval of the car is a legal act.