WARNING: Leaving odometer information blank or providing false information may result in fines or imprisonment. 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.Create a motorcycle bill of sale for Utah so you can document all the important details of your sale and ownership transfer. Motor Vehicle Bill of Sale (Form TC-843)– Can be used to prove the sale and purchase of either a motorcycle or automobile in the state of Utah. Create a Utah bill of sale form to document the transfer of ownership of a vehicle or another piece of personal property. Utah State Tax Commission. This form will cover your registration as well. How to fill out the Motorcycle Bill of Sale Template Download? Filling out the form correctly: Ensure all fields on the bill of sale form are accurately completed, and all necessary information is filled in. Although not legally required, the Utah DMV advises and provides private sellers with a bill of sale (form TC-843) to use when selling your car on your own.