I certify that, to the best of my knowledge, the title is. No notary is needed to sign off on a title.If a Utah title is lost, the buyer and seller may fill out a Form TC-123, Application for a Duplicate Title. 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. This application asks for the new owner's information, like driver's license number and address. The buyer is required to keep an original copy of the bill of sale, and the seller is obligated to sign over any title or ownership documents to the new owner. 1. Obtain the Utah State Motor Vehicle Bill of Sale form. The buyer must keep an original copy of the document, and the seller must sign over any title or ownership to the new owner. Required documentation may include a vehicle title, bill of sale, previous registration, emission certificate or safety certificate where required.