South Carolina law requires that you register your newly purchased vehicle within 45 days of the purchase date. This form provides identifying information for the vehicle and information about the seller and the buyer.Use our templates to draft South Carolina bills of sale. Motor Vehicle Bill of Sale – This document will provide information regarding the identification, sale, purchase, and change of ownership of a motor vehicle. A South Carolina motor vehicle bill of sale is a form used to document the transfer of ownership of a motor vehicle in South Carolina.