Wyo. Stat. § 36-2-209: Notice of perfected appeal; proof of service.

Upon the approval of the bond as aforesaid, the clerk of the district court shall immediately issue a notice to the director and to said appellees and each of them that said appeal has been perfected; such notice may be served personally upon the appellees or their attorneys of record by any appellant or his attorney of record, or by registered mail, by the clerk of the district court. Proof of service may be made by the affidavit of the person making the service and also by the return registry receipt where service is made by registered mail.