Information you can expect to fill out includes the car's VIN, make, and model, the name and permanent address of each party involved, and the sales amount. This is a tutorial on the California residential purchase agreement.Visit the California DMV's website and download a bill of sale. A California motor vehicle bill of sale is part of the vehicle registration process. Use a free template to write your own bill of sale. Below, we've outlined the steps and forms required for how to sell a car in the state of California so you can sell your car quickly for the most cash.