Iowa Code § 490.504
2. If a corporation has no registered agent, or the agent cannot with reasonable diligence be served, the corporation may be served by registered or certified mail, return receipt requested, addressed to the secretary at the corporation’s principal office. Service is perfected under this subsection at the earliest of the following:
3.
a. The secretary of state shall be an agent of the corporation upon whom process, notice, or demand may be served, if any of the following applies:
b. Service of any process, notice, or demand on the secretary of state as agent for a corporation may be made by delivering to the secretary of state duplicate copies of the process, notice, or demand. If process, notice, or demand is served on the secretary of state, the secretary of state shall forward one of the copies by registered or certified mail, return receipt requested, to the corporation at the last address shown in the records of the secretary of state. Service is effected under this subsection at the earliest of the following:
89 Acts, ch 288, §35; 96 Acts, ch 1170, §7; 2021 Acts, ch 165, §42, 230
Referred to in §490.1421, 490.1422, 490.1423, 490.1507, 490.1509, 490.1511, 624.23