Wyo. Stat. § 2-7-102: Penalty for administering without proving will or taking letters of administration.

Any person, except one acting under the provisions of W.S. 2-1-201 and 2-1-202, who administers the personal estate of any person dying after the passage of this act, or any part thereof, without proving the will of the deceased or taking out letters of administration of such personal estate, shall be punished by imprisonment in the county jail not more than one (1) year or by a fine not exceeding five hundred dollars ($500.00) or both.