S.C. Code § 15-67-60
In all actions brought under this article the court, or a judge thereof, shall refer the action to a master or special referee to take the testimony as to the plaintiff's claim or title and as to all the facts and circumstances unless the testimony shall be taken in open court and carefully inquire as to the existence of claim by and residence of all nonresidents. If it shall appear to the court or judge that there probably exists a bona fide claim or lien on the part of any such nonresident or minor, whose name and whereabouts can be ascertained, no decree adjudicating the rights of such minor or affecting or quieting the title as against him or her shall be rendered unless personal service upon him or her outside of the State after order for publication shall first be made and proved as provided in Section 15-67-30.
S.C. Code § 15-67-60