Wyo. Stat. § 34-5-102
All deeds, mortgages or other instruments executed five (5) years prior to January 1, 1935, not witnessed, and admitted to record, which, under the laws of the state of Wyoming should have been executed in the presence of one (1) witness, shall be deemed as valid and binding as if the same had been executed in the presence of a witness, and shall be so construed by the courts of this state, and the records thereof shall have the same force and effect as if such deeds, mortgages, and other instruments had been executed in the presence of a witness; provided, that such record shall in no wise affect the right or title of any person acquired in good faith and for a valuable consideration five (5) years before the said 1st day of January, 1935; and provided, further, that this section shall not be construed to affect any judgment or decree rendered by any court of the state of Wyoming before that time.
W.S. 34-5-102