048-2 Wyo. Code R. § 2-3
(a) All applications, petitions, complaints, protests, and other written communications shall be addressed to the administrator, Division of Community Programs, Hathaway Building, Cheyenne, Wyoming 82002.
(b) All application, petitions, complaints, protests and other written communications shall be deemed to be received on the date they are actually delivered to the Administrator as documented by the stamped receipt date in the Division.
(c) Official notices required by law or by these rules to be served shall be served in person or by certified mail return receipt requested addressed to the last known address of the addressee. Service is deemed complete when the return receipt is received by the Division signed by the addressee or his agent and dated with the date of delivery.
048-2 Wyo. Code R. § 2-3