Wis. Stat. § 809.802: Rule (Service on the state in certain proceedings).

(1) Any document required or authorized to be served on the state in appeals and other proceedings in felony cases in the court of appeals or supreme court shall be served on the attorney general unless the district attorney has been authorized under s. 978.05 (5) to represent the state. Any document required or authorized to be served on the state in appeals and other proceedings in misdemeanor cases decided by a single court of appeals judge under s. 752.31 (2) and (3) shall be served on the district attorney. Every petition for review of a decision of the court of appeals in a misdemeanor case shall be served on the attorney general.

(2) Where service on the attorney general is required under sub. (1), the clerk of the court of appeals shall opt in the attorney general as an attorney for the state and provide the notice of docketing to the attorney general through the appellate electronic filing system. For the attorney general, receipt of the notice of docketing provides access to the proceeding and constitutes service of the initiating document and other documents filed with the initiating documents.