Wis. Stat. § 783.07: Fine or imprisonment.

Whenever a peremptory mandamus is directed to any public officer, body, board or person commanding the performance of any duty specially enjoined by law and the officer or person or any member of the body or board has, without just excuse, refused or neglected to perform the duty so enjoined, the officer, person or member of the body or board is guilty of a Class H felony.