S.C. Code § 30-15-40
If any clerk of court shall be in doubt as to whether or not any paper so presented for registration is an official discharge from the Army, Navy or Marine Corps of the United States or an official certificate of lost discharge, he may examine, under oath, the person so presenting such discharge or otherwise inquire into its validity. And every clerk of court to whom a discharge or certificate of lost discharge is presented for registration shall administer to the person offering such discharge or certificate of lost discharge for registration the following oath, to be recorded with and form a part of the registration of such discharge or certificate of lost discharge:
"I, __________, being duly sworn, depose and say that the foregoing discharge (or certificate of lost discharge) is the original discharge (or certificate of lost discharge) issued to me by the government of the United States and that no alterations have been made therein by me or by any person to my knowledge.
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"Subscribed and sworn to before me this _____ day of ____________ 19___
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S.C. Code § 30-15-40