S.C. Code § 61-4-30
Beer or wine sold by wholesalers to the holders of retail licenses in this State must be sold for cash only at the time of delivery or prior to delivery. For purposes of this section, "cash" means money or a bona fide check, money order, or electronic transfer of funds if the transfer of funds is initiated by an irrevocable payment order on or before delivery of the beer or wine. The electronic transfer must be initiated by the wholesaler no later than one business day after delivery. A holder of a retail permit who issues a check or an irrevocable payment order in payment for beer or wine with insufficient funds at the bank to cover the check violates the provisions of this section. This provision for cash payment applies to cash deposits on empties when beer is delivered in returnable containers. This deposit on bottles or draft beer containers must not be less than the charge from the brewery to the wholesaler.
S.C. Code § 61-4-30