Wyo. Stat. § 18-10-217
After ascertaining the best terms and the lowest interest at which the bonds can be negotiated, the board shall secure the proper engraving and printing and consecutive numbering thereof and the bonds shall then be properly prepared and executed. They must bear the signature of the president of the board of trustees and be countersigned by the county treasurer of the county in which the funds of the district are kept, and the coupons attached to the bonds must be signed by the president, secretary and county treasurer. The secretary of the board shall endorse and sign in his official capacity a certificate upon every bond that it is within the lawful debt limit of the district and is issued according to law. When so executed the bonds shall be registered by the county treasurer where the funds of the district are kept in a book provided for that purpose, which must show the number and amount of each bond and the person to whom it is issued.
W.S. 18-10-217