Wyo. Stat. Ann. § 2-6-210

Letters testamentary must be substantially in the following form: State of Wyoming ) )ss County of .... ) The last will of A. B., deceased, a copy of which is hereto attached, having been proved and recorded in the district court within and for the county of ...., C. D. is hereby appointed executor. Witness, G. H., clerk of the district court of the .... district within and for the county of .... with the seal of the court affixed, the .... day of .... A.D. .... .............................Clerk.