N.C. Gen. Stat. § 58-51-10
Every individual or family hospitalization policy, certificate, contract or plan issued for delivery in the State of North Carolina on and after July 1, 1961, must have printed thereon or attached thereto a notice stating substantially: "YOUR POLICY MAY NOT BE IN FORCE WHEN YOU HAVE A CLAIM! PLEASE READ! Your policy was issued based on the information entered in your application, a copy of which is attached to the policy. If, to the best of your knowledge and belief, there is any misstatement in your application or if any information concerning the medical history of any insured person has been omitted, you should advise the Company immediately regarding the incorrect or omitted information; otherwise, your policy may not be a valid contract. RIGHT TO RETURN POLICY WITHIN 10 DAYS. If for any reason you are not satisfied with your policy, you may return it to the Company within 10 days of the date you received it and the premium you paid will be promptly refunded." If a policyholder or certificate holder or purchaser of a contract or plan returns same pursuant to such notice, coverage under such policy, certificate, contract or plan shall become void immediately upon the mailing or delivery of the contract, certificate, policy or plan to the insurance company at its home or branch office or to the agent through whom it was purchased. Coverage shall exist under such policy, certificate, contract or plan within said 10-day period until said mailing or delivery of the contract.
N.C. Gen. Stat. § 58-51-10