A Texas motor vehicle bill of sale is a legal document used to demonstrate that a motor vehicle has been sold. Insurer must be authorized to do business in Texas.I agree to give you proof of property insurance. A Texas bill of sale form records an exchange of property between a buyer and a seller. 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. "Streamline your personal property transactions with our General Bill of Sale Form.