Change machines are unmanned payment terminals that change money in tokens that can be used on site.
Accepting payments in a central location and changing to tokens reduces the required investment in security of cash. It facilitates acceptance of different payment methods and to adjust pricing. In addition, customers are more likely to return when they still have some of your tokens.
Typical locations to install change machines are arcades, car washes, laundries, 24/24 shops. Often the tokens represent a monetary value, so a custom made token is recommended rather than a generic standard token. This increases customer loyalty and reduces risk of receiving tokens from other companies.