Wyo. Stat. Ann. § 11-20-117
(a) It is unlawful for any person in Wyoming to use an unrecorded brand for the purpose of claiming ownership of or to identify livestock with a brand not recorded in his name except as otherwise provided in W.S. 11-20-125.
(b) Anyone violating subsection (a) of this section shall be punished as provided in W.S. 11-1-103.