The law permits certain owners and occupants of property to prohibit persons from carrying a concealed firearm in or on the property. A person may be subject to a Class B forfeiture [Wis. Stat. § 939.52 (3)(b)] if he or she carries a firearm on the property after being notified not to remain on the property or remain with a specific type of firearm. In the latter case, a property owner can prohibit a person form possessing a specific type of firearm on their property or any firearm.
Wis. Stat. § 943.13(1m)(b) Wisconsin Legislature: 943.13
Class B forfeiture, a forfeiture not to exceed $1,000
Wis. Stat. § 939.52 (3)(b) Wisconsin Legislature: 939.51