I certify that, to the best of my knowledge, the title is. 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. A Utah Bill of Sale acts as a legal record for the transfer of property. It's mandatory in Utah to transfer vehicle ownership. Create a Utah bill of sale form to document the transfer of ownership of a vehicle or another piece of personal property. Bring the completed bill of sale, signed title, odometer disclosure statement, and any other required documents specific to your state. Use Utah bills of sale to document the transfer of ownership of a car, boat, firearm, or other personal property from a seller to a buyer. This form below is designed for use on upon the sale of a motor vehicle or automobile. Use a Utah motor vehicle bill of sale form to create a legally binding record of your vehicle sale and confirm ownership transfer.