040-55 Wyo. Code R. § 55-3
No person shall leave meat from a big game animal or game bird at a meat processing plant for more than forty-five (45) days.
(a) Following the expiration of the forty-five (45) day period in this section, the owner or operator in charge of the meat processing plant shall send by first class mail a notice to the last known mailing address of the license holder who harvested the meat. The notice shall state that the meat must be removed from the meat processing plant within ten (10) calendar days following the postmarked date on the envelope containing the notice. The owner or operator in charge of the meat processing plant shall maintain a written record indicating the date the notice was postmarked, to whom the notice was mailed and the address to which the notice was mailed.
(b) The owner of the meat shall remove the meat from the meat processing plant within ten (10) calendar days following the date the written notification from the meat processing plant was postmarked.
(c) If the letter sent by the owner or operator in charge of the meat processing plant to the last known mailing address of the owner of the meat is returned as undeliverable, the owner or operator in charge of the meat processing plant shall maintain the returned letter indicating it was undeliverable.
040-55 Wyo. Code R. § 55-3