Wis. Stat. § 236.35: Sale of lands abutting on private way outside corporate limits of municipality.

(1) No person shall sell any parcel of land of one acre or less in size, located outside the corporate limits of a municipality, if it abuts on a road which has not been accepted as a public road unless the seller informs the purchaser in writing of the fact that the road is not a public road and is not required to be maintained by the town or county.

(2) Any person violating this section may be fined not more than $200 or imprisoned not more than 30 days or both.