Minn. Stat. § 624.30: MANUFACTURE AND DISTRIBUTION OF TOKENS, WHEN PROHIBITED.

The manufacture, sale, offering for sale, advertising for sale, or distribution of tokens, checks, or slugs similar in size and shape to lawful coin of the United States with knowledge or reason to believe that such tokens, checks, or slugs may be used in substitution for any such lawful coin in any vending machine, parking meter, service meter, coin box telephone, or other coin receptacle designed to receive or be operated only by lawful coin of the United States in connection with the sale, use, or enjoyment of property, privilege, or service, is hereby prohibited.