(1)    A limited liability company or registered foreign limited liability company may be served with any process, notice, or demand required or permitted by law by serving its registered agent. The department may serve any written notice required or authorized under this chapter by e-mailing it to the registered agent’s e-mail address on file with the department, and such notice shall be effective as provided in s. 183.0103 (5).

   (2)   Except as provided in sub. (3), if a limited liability company or registered foreign limited liability company had no registered agent, or its registered agent cannot with reasonable diligence be served, the company or foreign company may be served by registered or certified mail, return receipt requested, or by similar commercial delivery service, addressed to the company or foreign company at its principal office, as shown on records of the department on the date of sending. Service is perfected under this subsection at the earliest of the following:

      (a)    The date the company or foreign company receives the mail or delivery by the commercial delivery service.

      (b)    The date shown on the return receipt, if signed on behalf of the company or foreign company.

      (c)    Five days after it is deposited in the U.S. mail, or with the commercial delivery service, if correctly addressed and with sufficient postage or payment.

   (3)   If process, notice, or demand in an action cannot be served on a limited liability company or registered foreign limited liability company pursuant to sub. (1) or (2), service may be made by handing a copy to the individual in charge of any regular place of business or activity of the company or foreign company if the individual served is not a plaintiff in the action. If the address of the company’s or foreign company’s principal office cannot be determined from the records of the department, the company or foreign company may be served by publishing a class 3 notice, under ch. 985, in the community where the company’s or foreign company’s principal office or registered office, as most recently designated in the records of the department, is located.

   (4)   Service of process, notice, or demand on a registered agent must be in a written record.

   (5)   Service of process, notice, or demand may be made by other means under law other than this chapter.