South Carolina law requires that you register your newly purchased vehicle within 45 days of the purchase date. Use our templates to draft South Carolina bills of sale.The documentation and forms required for titling a vehicle are based on the situation involving the vehicle, as described in the table below. A bill of sale or other proof of ownership transfer. Motor Vehicle Bill of Sale – This document will provide information regarding the identification, sale, purchase, and change of ownership of a motor vehicle. Proof of ownership may be a bill of sale, conditional sales contract, out ofstate registration, etc. 4.