Wisconsin Statutes Police Regulations (Ch. 163 to 177) § 170.105. Chattels found by public officials, employees or agents

(1) Notwithstanding ss. 170.07 and 170.08, if an official, employee or agent of the state or of a county, city, village or town finds $25 or more or any goods having a value of at least $25 while acting within the scope of his or her official duties, employment or agency, he or she shall transfer custody of the found money or goods to the agency in the city, village or town where the money or goods were found that is designated by the city, village or town governing body to receive found money or goods. That agency shall post a notice of the found money or goods in 2 public places in the city, village or town.

(2) If the owner of lost money or goods appears within 90 days after the notice is posted under sub. (1) and makes out his or her right to the found money or goods, he or she shall have restitution of the money or goods or the value of the money or goods upon paying all of the costs and charges on the money or goods. If no owner of lost money or goods appears within 90 days after the notice is posted under sub. (1), the found money or goods become the property of the state or county, city, village or town whose official, employee or agent found the lost money or goods.