County of Harris. §. A bill of sale in Texas is a legally binding document that records the details of a transaction.Instructions. This form must be submitted with the Rebuilt Vehicle Statement (Form VTR-61) when submitting a new application. Though standard form bill of sales are available online and from your local county tax collector's office, it's also perfectly acceptable to write your own. 1. Enter the seller's name and address. This blog post is tailored to help you understand how to draft, why it's necessary, and where you can obtain a Texas bill of sale. Create a personalized binding Texas bill of sale to transfer ownership of a vehicle, boat, or personal item in a private sale safely and securely.