S.C. Code Ann. § 12-4-395: Authority to accept payment by credit card.

The department may accept, on terms and conditions it establishes, payments to it by credit cards. This authority includes a determination not to accept credit card payments or to accept credit card payments only for certain classes of payments as specified by the department. Notwithstanding another provision of law, the State Treasurer may enter into contracts on behalf of the department by which the department may accept credit card payments. The department may withhold the actual cost of processing credit card payments from deposits of the payments and may treat these withholdings as reimbursements of the associated expenditures.