S.C. Code § 22-3-1450
If the property taken be claimed by any other person than the defendant or his agent and such person shall make affidavit to his title thereto and right to the possession thereof, stating the grounds of such right and title, and serve such affidavit upon the constable, the constable shall not be bound to keep the property or deliver it to the plaintiff unless the plaintiff on demand of him or his agent shall indemnify the constable against such claim by an undertaking executed by two sufficient sureties, accompanied by their affidavits that they are each worth double the value of the property as specified in the affidavit of the plaintiff and are freeholders and householders of the county. No claim to such property by any other person than the defendant or his agent shall be valid against the constable unless made as aforesaid. And notwithstanding such claim, when so made, he may retain the property a reasonable time to demand such indemnity.
S.C. Code § 22-3-1450