Signature of Seller. MV-912: Vehicle Bill of Sale (PDF). English.Use this form to show proof of a vehicle ownership transfer through a private sale. Download. This is typically one of the first items you'll put on the bill of sale. Clearly print or type all information, except signatures. We will be addressing how to fill out a bill of sale form for the sale of a car so let's get started with this guide to filling out a bill of sale form. Next, provide the vehicle details, including make, model, and VIN.