Wis. Stat. § 102.37: Employers’ records.

Every employer of 3 or more persons and every employer who is subject to this chapter shall keep a record of all accidents causing death or disability of any employee while performing services growing out of and incidental to the employment. This record shall give the name, address, age, and wages of the deceased or injured employee, the time and causes of the accident, the nature and extent of the injury, and any other information the department may require by rule or general order. Reports based upon this record shall be furnished to the department at such times and in such manner as the department may require by rule or general order, in a format approved by the department.