Wyo. Stat. § 34-1-133
Whenever any nonresident of this state shall die without this state, owing, at the time of his death, debts secured by mortgage or other incumbrance upon real or personal property situated in this state, and the debtor shall make voluntary payment of such debt to the executor of the last will and testament of such deceased person, or to the administrator of the estate of such deceased person, whose letters testamentary or of administration, as the case may be, were issued from the proper court of the state or territory of the United States, where such deceased creditor resided at the time of his death, it shall be lawful and competent for such executor or administrator to execute a full and valid release, and acquittance of such debt, and of the mortgage or other incumbrance securing the same; provided, that there shall be attached to such release and acquittance, and made a part thereof, a full and complete transcript of the records of the court issuing such letters testamentary or of administration, as the case may be, certified to by the clerk of such court, or other proper custodian of the records thereof, under his hand and under the seal of such court, fully exhibiting the due appointment and qualification of such executor or administrator, and there shall also be attached to such release and made a part thereof, a certificate under the hand of the presiding judge of such court, or the clerk thereof, that at the date of such release, the person or persons executing the same, was such duly appointed and qualified executor or administrator, as set forth in such release. Any release so executed shall be admitted to record, in this state, in the office of any of the county clerks and upon being recorded in the proper office, the county clerk shall discharge the mortgage or other incumbrance in such release mentioned, in the manner provided by law, but this section shall not be construed to authorize any administrator appointed by the courts of any other state or territory of the United States, to exercise any power, within the state other than the power to receive voluntary payments of debts due to his intestate, and to release mortgages or other incumbrances upon property situate in this state and securing such debts.
W.S. 34-1-133