Wis. Stat. § 105.04: Fee-splitting.

No employment agent or any employee or agent thereof, shall divide or offer to divide, or share directly or indirectly, any fee, charge or compensation received from any applicant for employment, with any employer, superintendent, manager, foreman, or any other person who hires help or to whom help is furnished by an employment agent; and it shall be unlawful for any employer, superintendent, manager, foreman, or any other person who hires help to receive any compensation or any valuable consideration from any applicant for employment or from any employment agent for giving employment to said applicant or to any employees furnished by said employment agent.