Selling your car car in California might seem overwhelming. Be prepared with this checklist of the most common documents to sell your car.You just fill out the title with their info and then make a copy or photo of it complete for your records. The California bill of sale form helps individuals document data on a transaction involving the sale, trade, or gift of personal property. A Bill of Sale is a document that moves ownership of some item from one person to another. Avoid white-out, scribbles, and strike-throughs.