Wis. Stat. § 181.0503: Resignation of registered agent.

(1) A registered agent may resign as agent for a corporation by delivering to the department for filing a statement of resignation that states all of the following:

(a) The name of the corporation.

(b) The name of the agent.

(bm) That the agent resigns from serving as registered agent for the corporation.

(c) The address of the corporation to which the agent will send the notice required by sub. (4).

(3) The resignation under sub. (1) is effective and, if applicable, the registered office is discontinued on the earlier of the following:

(a) Sixty days after the department receives the statement of resignation for filing.

(b) The date on which the appointment of a successor registered agent is effective.

(4) A registered agent promptly shall furnish to the corporation notice in a record of the date on which a statement of resignation was filed.

(5) When a statement of resignation takes effect, the registered agent ceases to have responsibility under this chapter for any matter thereafter tendered to it as agent for the corporation. The resignation does not affect any contractual rights the corporation has against the agent or that the agent has against the corporation.

(6) A registered agent may resign with respect to a corporation whether or not the corporation is in good standing.