S.C. Code § 56-19-840
A proprietor, an owner, or an operator of any towing company, storage facility, garage, or repair shop or any person who repairs or furnishes any material for the repair of a vehicle, where a vehicle remains unclaimed for a period of thirty days, must report the vehicle as unclaimed to the Department of Motor Vehicles within five days after the expiration of the thirty-day period. The report must be on a form prescribed by the department. The form may be submitted before the thirty-day period expires.
A vehicle is considered "unclaimed" when the owner of the vehicle has not reclaimed it within thirty days after notification pursuant to Sections 29-15-10 and 56-5-5630. A person who fails to report a vehicle as unclaimed in accordance with this section forfeits all claims, liens, or costs associated with the towing and storage.
S.C. Code § 56-19-840