Wyo. Stat. § 20-1-108: Offenses relating to marriage generally.

If the county clerk neglects to record a marriage certificate, or if any person performs a marriage ceremony knowing that he is not legally authorized to do so or knowing of any legal impediment to the proposed marriage, he is guilty of a misdemeanor and shall be punished by a fine not exceeding five hundred dollars ($500.00) or imprisonment for not exceeding one (1) year.