N.C. Gen. Stat. § 159-32.1: Electronic payment.

A unit of local government, public hospital, or public authority may, in lieu of payment by cash or check, accept payment by electronic payment as defined in G.S. 147-86.20 for any tax, assessment, rate, fee, charge, rent, interest, penalty, or other receivable owed to it. A unit of local government, public hospital, or public authority may pay any negotiated discount, processing fee, transaction fee, or other charge imposed by a credit card, charge card, or debit card company, or by a third-party merchant bank, as a condition of contracting for the unit's or the authority's acceptance of electronic payment. A unit of local government, public hospital, or public authority may impose the fee or charge as a surcharge on the amount paid by the person using electronic payment. (1999-434, s. 5.)