Okla. Stat. tit. 28 § 32.3
Notwithstanding any other provision of law, a county clerk may accept payment for fees by automated clearing house or by a nationally recognized debit or credit card. If payment is made by a credit or debit card, the county clerk shall add an amount equal to the amount of the service charge incurred for the acceptance of the payment. A county clerk may enter into contracts for credit card processing services according to applicable county purchasing laws or may enter into agreements with the State Treasurer to participate in any credit card processing agreements entered into by the State Treasurer. County clerks may establish prepaid fee accounts in a manner as prescribed by the Office of the State Auditor and Inspector.
Okla. Stat. tit. 28, § 32.3