Wyo. Stat. § 31-2-212
Upon loss, mutilation or destruction of a certificate of registration, license plate, or validation sticker the owner of a vehicle may obtain a duplicate certificate of registration, new license plates or validation stickers from any county treasurer or the department if the vehicle was registered or plates or stickers were issued by the department upon application showing the loss, mutilation or destruction, return of mutilated plates or stickers and payment of the duplicate registration, plate or sticker fee. For those vehicles registered under the provisions of W.S. 31-2-213(h), 31-2-215 through 31-2-223, 31-2-226, 31-2-227 or 31-2-229 through 31-2-233 replacement duplicate license plates may be obtained upon application with the county treasurer from which the original plates were purchased or the department if applicable, accompanied by fees as provided by W.S. 31-3-102(a)(vi)(C). Duplicate license plates obtained under this section to replace lost or stolen plates shall not be displayed on the vehicle until the validation stickers on the lost or stolen plates have expired. Upon loss, mutilation or destruction of a dealer plate or validation sticker the dealer may obtain a replacement dealer plate or validation sticker from the county treasurer from which he purchased the original plate in the same manner as the owner of a vehicle and upon payment of the appropriate fee under W.S. 31-3-102(a)(vi). Obtaining a replacement plate is not the purchase of an additional plate under W.S. W.S. 31-16-125(b)(i). Upon application for new license plates or stickers the county treasurer shall notify the department and the county sheriff as soon as possible of the loss, mutilation or destruction. The department shall notify the appropriate law enforcement agencies of any loss, mutilation or destruction of license plates or stickers.
W.S. 31-2-212