No information is available for this page. An RV Bill of Sale is a legal document that serves as proof of the sale and transfer of ownership of a recreational vehicle (RV) from a seller to a buyer.Most commonly used for vehicle transactions, the form includes sale information required for accounting and registration purposes. How do I fill this out? This is typically one of the first items you'll put on the bill of sale. Motor Vehicle Sales Tax is due on most motor vehicle sales or transfers. Tax is due when a title transfers unless an exemption applies. Trailer Bill of Sale. Use for Non-Titled Trailers GVW 3,000 and Under. Use for Non-Titled Boats, Snowmobiles, and ATVs.