Wis. Stat. § 768.03: Unlawful to file or threaten actions barred.

It is unlawful for any person, either as a party or attorney, to commence, or threaten to commence, in any court in this state, any action, or to serve and file in such court or threaten to so do any process, pleading or paper, setting forth or seeking to recover a sum of money upon any cause of action abolished or barred by this chapter, whether such cause of action arose within or without this state.