Wyo. Stat. § 1-23-103: Filing pleading or service of process prohibited.

It is unlawful for a person either as a party, attorney or an agent of either, to file or serve or threaten to cause to be filed or served, any process or pleading in any court of the state, setting forth or seeking to recover money upon any cause of action abolished or barred by W.S. 1-23-101, whether the cause of action arose in or out of the state.