Missouri Revised Statutes Title XXIII. Corporations, Associations and Partnerships § 347.033. Service upon agent deemed service on company--service upon organizer--secretary of state deemed agent of company, when

1. The registered agent so appointed by a limited liability company shall be an agent of such limited liability company upon whom any process, notice or demand required or permitted by law to be served upon the limited liability company may be served, and which, when so served, shall be lawful personal service on the limited liability company.

2. In lieu of service upon the registered agent, process, notice or demand may be served upon an authorized person or in the event neither the registered agent nor an authorized person can be located in the exercise of due diligence, process, notice or demand may be served upon an organizer.

3. In the event that a limited liability company shall fail to appoint or maintain a registered agent in this state or in the event neither the registered agent, an authorized person, nor an organizer for the limited liability company can be located in the exercise of due diligence, then the secretary, as long as such default exists, shall be automatically appointed as an agent of such limited liability company upon whom any process, notice, or demand required or permitted by law to be served upon the limited liability company may be served. Service on the secretary of any process, notice or demand against a limited liability company shall be made by delivering to and leaving with the secretary, or with any clerk having charge of the limited liability company department of the secretary, a copy of such process, notice or demand. In the event that any process, notice or demand is served on the secretary, the secretary shall immediately cause a copy thereof to be forwarded by registered mail, to the address for any organizer as set forth in the articles of organization. The secretary shall keep copies of any process, notice or demand served upon the secretary pursuant to sections 347.010 to 347.187 for a period of five years. Nothing contained in this section shall limit or affect the right to serve any process, notice or demand required or permitted by law to be served upon a limited liability company in any other manner now or hereafter permitted by law.