Section 601.72 - Service of process through state officer(1) GENERAL. Under procedures specified in s. 601.73, the commissioner is by law constituted attorney, except in cases in which the proceeding is to be brought by the state against an insurer or intermediary other than a risk retention group or risk purchasing group, in which event the department of financial institutions is by law constituted attorney, to receive service of summons, notices, orders, pleadings and all other legal process relating to any court or administrative agency in this state for all of the following: (a)Authorized insurers. All insurers authorized to do business in this state, while authorized to do business in this state, and thereafter in any proceeding arising from or related to any transaction having any connection with this state, provided the requirements under s. 601.715(5) are satisfied.(b)Surplus lines insurers. All insurers as to any proceeding arising out of any contract that is permitted by s. 618.41, or out of any certificate, cover note or other confirmation of such insurance.(c)Unauthorized insurers. All insurers or other persons doing an unauthorized insurance business in this state, including but not limited to risk purchasing groups, as to any proceeding arising out of the unauthorized transaction.(d)Risk purchasing groups and nonresident intermediaries. All risk purchasing groups or nonresident intermediaries as to any proceeding arising out of insurance activities within this state or out of insurance activities related to policies on risks within this state.(2) APPOINTMENT OF ATTORNEY. Except as provided in sub. (2m), every licensed insurer by applying for and receiving a certificate of authority, every surplus lines insurer by entering into a contract subject to the surplus lines law, and every unauthorized insurer by doing an insurance business in this state, is deemed to have irrevocably appointed the commissioner and department of financial institutions as the insurer's attorneys in accordance with sub. (1).(2m) RISK RETENTION GROUPS AND RISK PURCHASING GROUPS. A risk retention group or risk purchasing group may not do an insurance business or engage in any insurance activity in this state until it registers with the commissioner and designates the commissioner as its agent for the purposes described in sub. (1). The commissioner may prescribe the form of registration under this subsection. If a risk retention group or risk purchasing group fails to designate the commissioner as required by this subsection, the commissioner is appointed agent for the risk retention group or risk purchasing group as provided in sub. (2).(3) OTHERS AFFECTED. The commissioner and department of financial institutions shall also be attorneys for the personal representatives, receivers, trustees, or other successors in interest of the persons specified in sub. (1).(4) FEES. Litigants serving process on the commissioner under this section shall pay the fees specified in s. 601.31(1) (p).(5) ORDINARY MEANS OF SERVICE. The right to substituted service under this section does not limit the right to serve summons, notice, orders, pleadings, demands or other process upon any person in any manner provided by law.1995 a. 27, 396; 2001 a. 102. The commissioner has the duty to accept service for all insurers, but does not have a duty to determine whether an insurer is a party to the action in which service is sought. Davies v. Heiman, 186 Wis. 2d 370, 520 N.W.2d 917 (Ct. App. 1994).