□ Not included with the vehicle sale. Appendix A: Site References; Legal Description.A vehicle sales agreement is a lawful arrangement summarizing the terms and conditions of a vehicle sale between a customer and a seller. 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. How to fill out the Free Printable Car Sale Contract Form? 1. Gather seller and buyer information. 2. 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 bill of sale will detail a transfer of property or sale of items between a seller and buyer.