Wyo. Stat. Ann. § 2-7-709

Any action, including any counterclaim in any pending action, pending against the decedent at the time of his death that survives shall be filed as a claim within the time provided in W.S. 2-7-703 by filing with the clerk in duplicate a certified copy of the order of the court in which the action is pending substituting the personal representative for the decedent, together with a certified copy of any pleading asserting contentions against the decedent. Any judgment thereafter rendered in the pending action shall be subject to the provisions of W.S. 2-7-719. If no claim is filed as provided in this section, any judgment rendered in the pending action, if sought to be enforced, shall be deemed to be a claim not timely filed under W.S. 2-7-703.