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.A bill of sale form can only be obtained at a local DMV office. A generic bill of sale will NOT be accepted. 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. How do I fill this out? To fill out the South Carolina Bill of Sale Affidavit, you need to gather detailed information about the seller, buyer, and vehicle. South Carolina Bill of Sale Form ✓ easily fill out and sign forms ✓ download blank or editable online.