1. A reverse vending machine apparatus for empty beverage containers, the reverse vending machine comprising: a receiving part for insertion of beverage containers; equipment for detecting and/or recognizing one or more inserted beverage containers; and a device for providing a token for the return value of said one or more inserted beverage containers, said token-providing device including: at least one first sensor that is configured to detect at least one biometric feature of a person inserting beverage containers into the reverse vending machine; and a device configured to define and register said detected biometric feature as a return value token.