S.C. Code Ann. § 4-13-10

No account shall be audited and ordered to be paid by the governing body of any county for any labor performed, fees, services, disbursements or any other matter unless it shall be made out in items and accompanied by an affidavit attached thereto and made by the person or officer presenting or claiming the same that the items are correct and that the labor, fees, disbursements, services or other matters charged therein have been in fact done, made, rendered or are due and that no part of the same has been paid or satisfied.