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.This form offers information regarding the seller, the buyer, the change of ownership, and the property being sold and purchased. It requires notarization. The California bill of sale form, REG 135, allows a buyer to purchase a motorized vehicle or vessel in the State. All fields should be filled-in on the form.