Documents Needed: Title or MCO: Original signatures required. Acceptable ID is required at the time of title transfer.The new owner must give the original bill of sale to the DMV along with the other required proofs of ownership when they title and register the vehicle. For a title transfer, you'll typically need the original title, a bill of sale, and, for property transfers, a deed. This is the motor number or serial number required for identification purposes. Vehicles are required to be titled in the buyer's name within 30 days from the date of sale. A detailed description of the process of writing a bill of sale when transferring ownership of a car to a buyer. A bill of sale benefits both the seller of a vehicle and the buyer. I Drive Safely will help you understand the importance of a Texas bill of sale. This video will show you how to fill out your Texas title, notice of vehicle transfer, and application for title.