S.C. Code Ann. § 40-10-220: Actions to enforce contract.

An entity that does not have a valid license as required by this chapter may not bring an action either at law or in equity to enforce the provisions of a contract. An entity that enters into a contract to engage in construction in a name other than the exact name that appears on its fire sprinkler contractor license may not bring an action either at law or in equity to enforce the provisions of a contract.