S.C. Code Ann. § 63-3-570: Service of summons.

Service of summons and any process of the court shall be made as provided by law for service in the court of common pleas. Provided, that if the judge is satisfied that it is impracticable to serve personally the summons or the process, he may order service by registered or certified mail, addressed to the last known address, or by publication thereof, or both. It shall be sufficient to confer jurisdiction if service is effected at least forty-eight hours before the time fixed in the summons or process for the return thereof.

Service of summons, process or notice required by this title may be made by any suitable person under the direction of the court, and upon request of the court shall be made by any peace officer.