W. Va. Code § 31B-9-906
(a) When a merger takes effect:
(b) The Secretary of State is an agent for service of process in an action or proceeding against the surviving foreign entity to enforce an obligation of any party to a merger if the surviving foreign entity fails to appoint or maintain an agent designated for service of process in this state or the agent for service of process cannot with reasonable diligence be found at the designated office. Upon receipt of process, the Secretary of State shall send a copy of the process by registered or certified mail, return receipt requested, to the surviving entity at the address set forth in the articles of merger. Service is effected under this subsection at the earliest of: