S.C. Code § 12-51-60
The successful bidder at the delinquent tax sale shall pay legal tender as provided in Section 12-51-50 to the person officially charged with the collection of delinquent taxes in the full amount of the bid on the day of the sale. Upon payment, the person officially charged with the collection of delinquent taxes shall furnish the purchaser a receipt for the purchase money. He must attach a copy of the receipt to the execution with the endorsement of his actions, which must be retained by him. Expenses of the sale must be paid first and the balance of all delinquent tax sale monies collected must be turned over to the treasurer. Upon receipt of the funds, the treasurer shall mark immediately the public tax records regarding the property sold as follows: Paid by tax sale held on (insert date). All other monies received, including any excess after payment of delinquent taxes, assessments, penalties, and costs, must be retained, paid out, and accounted for by the delinquent tax collector. Once a tax deed has been issued, the defaulting taxpayer and the owner of record immediately before the end of the redemption period must be notified in writing by the delinquent tax collector of any excess due. The notice must be addressed and mailed in the manner provided in Section 12-51-40(b) for taking exclusive possession of real property. Expenses of providing this notice are considered costs of the sale for purposes of determining the amount, if any, of the excess.
S.C. Code § 12-51-60