Wis. Stat. § 349.19

Any city, village, town or county may by ordinance require the operator of a vehicle involved in an accident to file with a designated municipal department or officer a report of such accident or a copy of any report required to be filed with the department. All such reports are for the confidential use of such department or officer and are otherwise subject to s. 346.73, except that this section does not prohibit the disclosure of a person’s name or address, of the name or address of a person’s employer or of financial information that relates to a person when requested under s. 49.22 (2m) to the department of children and families or a county child support agency under s. 59.53 (5).