Bill of sale doesn't mean anything in NC. Don't do it. You'll need the reassigned title, Bill of Sale, and proof of NC vehicle insurance to title and register the trailer.Learn about bills of sale in North Carolina for cars, boats, firearms, or other property. Access North Carolina bill of sale forms here! You don't need a bill of sale to transfer title in NC, that is only a contract between a seller and buyer which wont matter for a gift. The buyer must submit the completed title, proof of insurance, and a signed Bill of Sale (if applicable) to the NCDMV.