RSA 304-C:37 Service of Process on Domestic Limited Liability Companies.

I. A limited liability company's registered agent is the limited liability company's agent for service of process, notice, or demand required or permitted by law to be served on the limited liability company.
II. If a limited liability company has no registered agent or if the agent cannot with reasonable diligence be served, the limited liability company may be served by registered or certified mail, return receipt requested, addressed to the limited liability company at its principal office. Service is perfected under this paragraph at the earliest of:
(a) The date on which the limited liability company receives the mail;
(b) The date shown on the return receipt, if signed on behalf of the limited liability company; or
(c) Five days after its deposit in the