What information do I need to complete a bill of sale? This form below is designed for use on upon the sale of a motor vehicle or automobile.Such a bill of sale is needed to confirm a party's ownership in the car. Explore the ins and outs of Bills of Sale in our comprehensive guide, ensuring confident and secure buying and selling transactions. What should you include in your vehicle bill of sale? Learn about business bill of sale purchase agreement essentials, components, and steps for a successful transaction. You do not have many options to collect if they refuse to pay you the balance.