Wyo. Stat. § 33-17-101
Every landlord or keeper of a public inn or hotel in this state, who shall keep in his place of business an iron safe, in good order and suitable for the purpose hereinafter named, and who shall post or cause to be posted in some conspicuous place in his office, and on the inside of every entrance door to every bed chamber, the notice hereinafter mentioned, shall not be liable for the loss of any money, jewelry or other valuables belonging to his guests or customers, unless such loss shall occur by the hand or through the negligence of such landlord, or by a clerk or servant employed by him in such hotel or inn; provided, that nothing herein contained shall apply to such amount of money or other valuables as is usually common and prudent for any such guest to retain in his room or about his person.
W.S. 33-17-101