County of Harris. §. I agree to make payments according to the Payment Schedule in this contract.If more than one person signs as a buyer, I agree to keep all the promises in this. A Texas Bill of Sale Vehicle Form is a formal document used to record the sale and transfer of ownership of a vehicle from one party to another. Information you can expect to fill out includes the car's VIN, make, and model, the name and permanent address of each party involved, and the sales amount. A motor vehicle bill of sale is between a buyer and a seller of a car, truck, or motorcycle. It is signed as the last step in the sales process. Learn about bill of sale laws and requirements for the state of Texas. Get templates for buying and selling high-value items like cars, boats, and firearms. 1. Enter the seller's name and address.