S.C. Code Ann. § 63-17-2770

A child support enforcement agency in a jurisdiction outside this State may request the division to enforce a child support order issued by a court or administrative agency in another jurisdiction or a lien arising under the law of another jurisdiction. The order or lien must be accorded full faith and credit and the order or lien must be enforced as if the order was issued or the lien arose in South Carolina, without the necessity of registering the order with the court.