The registration requirement is to register an American limited liability company. The registrant must first submit a certificate of incorporation to the Secretary of State. If your American limited liability company provides professional services, you may need to obtain permission from the state professional licensing board.
Although a limited liability company in New Hampshire does not need a limited liability company operating agreement, if your LLC company has multiple members, it is wise to reach an agreement with other members. New Hampshire, USA recognizes the operating agreement of a limited liability company as a management document.