It contains information about the buyer and the seller, a description of the vehicle being sold, and information about the transaction, such as price. AUTHORIZATION. Buyer Signature: Date: ______.Print Name: Seller Signature: Date: ______. Motor Vehicle (DMV) Bill of Sale Form – Conveys the purchase and transfer of an automobile. The form consists of the significant vehicle, buyer, seller, and sale data, along with affirming signatures from both parties. 1. Upload the Texas Vehicle Bill of Sale PDF to PrintFriendly. For title or registration information, contact your county tax assessor-collector or the Texas Department of Motor Vehicles at. 1-888-368-4689 or 512-465-3000. This video will show you how to fill out your Texas title, notice of vehicle transfer, and application for title. Download forms from the Tax Assessor-Collector's office.