I certify that, to the best of my knowledge, the title is. Use a Utah motor vehicle bill of sale form to create a legally binding record of your vehicle sale and confirm ownership transfer.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. A Utah motor vehicle bill of sale is written documentation of a transfer of vehicle ownership. Create a Utah bill of sale form to document the transfer of ownership of a vehicle or another piece of personal property. 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. Dealer Services 801-297-2690; MVED: (801) 297-2600. The digital purchase agreement takes less than 60 seconds to complete.