Wisconsin Statutes Civil Procedure (Ch. 799 to 847) § 809.18. Rule (Voluntary dismissal)

(1) An appellant may dismiss a filed appeal by filing a notice of dismissal in the court or, if the appeal is not yet filed, in the circuit court. The dismissal of an appeal by the appellant or by agreement of the parties or their counsel does not affect the status of a lower court decision, the status of a cross-appeal, or the right of a respondent to file a cross-appeal.

(2) If the parties compromise or otherwise settle the entire matter in litigation prior to the issuance of the decision of the court of appeals, the appellant shall immediately inform the court in writing, signed by all parties, that the matter has been compromised or settled. Upon receipt of such information, the court shall dismiss the appeal in accordance with sub. (1).