N.C. Gen. Stat. § 58-70-120

Neither a collection agency nor any representative thereof who is not a duly licensed attorney shall engage in the practice of law. As used in this section, "practice of law" includes the preparation of warrants or subpoenas. A collection agency's representative is prohibited from appearing in court on behalf of a creditor except as required by court order or subpoena, and except to submit and explain claims in bankruptcy court.