A Texas boat bill of sale is a document that provides a record of the ownership transfer of a vessel. The completed form includes the purchase price, date of sale, a description of the boat, and the signatures of the buyer and seller.It contains information about the buyer and the seller, a description of the vehicle being sold, and information about the transaction, such as price. To fill out this form, first provide the sale date, buyer, and seller information. Next, specify the exchange details, including payment type and amounts. County of Harris. §. Texas Boat Bill of Sale ✓ easily fill out and sign forms ✓ download blank or editable online ✓✓ share online PDF templates in a minutes. Affidavit of Motor Vehicle Gift Transfer (Texas Comptroller of Public Accounts Form), 14-317. The form must be signed and can also be notarized for further validity. If you purchase or sell a boat in Texas, you may need to get a bill of sale.