N.C. Gen. Stat. § 18B-129: No liability for refusal to sell or for holding documents.

(a) No permittee or his agent or employee may be held liable for damages resulting from the refusal to sell or furnish an alcoholic beverage to a person who fails to show proper identification as described in G.S. 18B-302(d), or who appears to be an underage person.

(b) No permittee or his agent or employee may be held civilly liable if the permittee or his agent or employee holds a customer's identification documents for a reasonable length of time in a good faith attempt to determine whether the customer is of legal age to purchase an alcoholic beverage, provided the permittee or his agent or employee informs the customer of the reason for his actions. (1983, c. 435, s. 37.)