Chapter 1: General Registration Information. Learn about bills of sale in California for animals, vehicles, firearms, and more.A bill of sale is a legal document that outlines the purchase of property between a buyer and seller. It commonly includes both parties' information. 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. Selling or transferring ownership of a car, boat or other item of personal property? Easily create, print, and download a Bill of Sale in minutes. Whether you're buying or selling a vehicle, boat, or personal property, our template makes it easy to set up, fill out, and sign a clear bill of sale. Visit the California DMV's website and download a bill of sale.