Chapter 1: General Registration Information. Learn about bills of sale in California for animals, vehicles, firearms, and more.Step 1 Download the Adobe PDF. 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. A California bill of sale is a legal document that serves as proof of ownership transfer between a buyer and a seller. 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. How to fill out the Vehicle Bill of Sale Form for Document Submission?