N.C. Gen. Stat. § 7B-1907

All communications, notices, orders, authorizations, and requests authorized or required by G.S. 7B-1901, 7B-1903, and 7B-1904 may be made by telephone when other means of communication are impractical. All written orders pursuant to telephonic communication shall bear the name and the title of the person communicating by telephone, the signature and the title of the official entering the order, and the hour and the date of the authorization.