Wyo. Stat. § 40-16-101: Prohibited.

It shall be unlawful for any person, firm, association or corporation to use, issue, or distribute, or for any person, firm, association or corporation to furnish to any other person, firm, association or corporation to use, issue or distribute, in, with, or for the sale of goods, wares, merchandise or service, any stamps, coupons, tickets, certificates, cards, or other similar devices, which shall entitle the purchaser receiving the same with the sale of goods, wares, merchandise or service to procure from any person, firm, association or corporation, any goods, wares, merchandise or service upon the production of any number of such stamps, coupons, tickets, certificates, cards or other similar devices.