â–ˇ Not included with the vehicle sale. 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.A Utah motor vehicle bill of sale, known as Form TC-843, is an official document that provides proof that a vehicle has been sold in the State of Utah. 1. Obtain the Utah State Motor Vehicle Bill of Sale form. Motor Vehicle Bill of Sale Also called "Form TC843," this bill of sale documents the sale of motor vehicles in Utah. Create a Utah bill of sale form to document the transfer of ownership of a vehicle or another piece of personal property. You can use the form the state of Utah provides (Form TC-843), or you can draft your own. Use a Utahspecific Bill of Sale form. Include all collected information methodically.