Can you register a car with a bill of sale and no title in California? The new owner must go to the DMV with the acceptable proof of ownership and a bill of sale.The bill of sale must show the purchase price and the amount of out-of-state sales tax paid to the dealer. Clearly print or type all information, except signatures. A title determines vehicle ownership. When you buy or inherit a vehicle, the title must be transferred into your name to verify the ownership has passed.