S.C. Code § 19-21-20
Any person interested in the preservation of the contents of any deed, release, private writing usually put on record or document alleged to have been lost, destroyed or defective in the record thereof and desiring to preserve the evidence thereof for any purpose may, by summons and complaint as provided by Title 15, institute an action in the court of common pleas to perpetuate testimony as to the existence and true contents of the same. In such complaint the defects, if any, complained of in the record shall be substantially set forth and to such action all persons interested or known or supposed to claim an interest in the property to which such testimony may relate shall be made parties defendant and served with summons as provided by law in civil actions.
S.C. Code § 19-21-20