The form consists of the significant vehicle, buyer, seller, and sale data, along with affirming signatures from both parties. Your Texas bill of sale for RVs is a legal document that formally records the sale and purchase of a recreational vehicle (RV) within the state of Texas.A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. Motor Vehicle Bill of Sale Relays the details of a transaction involving a used vehicle. Download: PDF, Word (. Sample Motor Vehicle Bill of Sale. The Texas bill of sale form verifies the elemental facts of the sale of personal property in exchange for a predetermined compensatory amount. It serves as proof of purchase, helps with title transfer and registration, and provides legal protection for both parties involved in the transaction. An RV (recreational vehicle) bill of sale is a legal form that is completed when a motorhome or travel trailer is sold privately or through a dealer. Errors or alterations on the title or other documents presented for title transfer may require this form to be notarized.