Wis. Stat. § 941.2905: Straw purchasing of firearms.

(1) Whoever intentionally furnishes, purchases, or possesses a firearm for a person, knowing that the person is prohibited from possessing a firearm under s. 941.29 (1m), is guilty of a Class G felony.

(2) The prohibition in sub. (1) against possessing a firearm for a person who is prohibited from possessing a firearm does not apply to the possession of a firearm by any of the following:

(a) A person to whom the firearm is surrendered under s. 813.1285.

(b) A person who has been designated under s. 51.20 (13) (cv) 3. to store the firearm during the duration of the order under s. 51.20 (13) (cv) 1. not to possess a firearm.

(c) A person who has been designated under s. 51.45 (13) (i) 3. to store the firearm during the duration of the order under s. 51.45 (13) (i) 1. not to possess a firearm.

(d) A person who has been designated under s. 54.10 (3) (f) 3. to store the firearm during the duration of the order under s. 54.10 (3) (f) 1.

(e) A person who has been designated under s. 55.12 (10) (c) to store the firearm during the duration of the order under s. 55.12 (10) (a).

(f) A person not covered under pars. (a) to (e) who has been designated to store the firearm during the duration of any temporary prohibition on the possession of a firearm.