Provided are embodiments of a supply medium exchange system. The system includes at least one supply medium exchange station having at least one supply medium exchange interface. It is configured to exchange a supply medium with at least one mobile unit including at least one supply medium storage and at least one first peer-to-peer module assigned to the mobile unit. It is also configured to communicate with at least one peer-to-peer application of at least one peer-to-peer network. The first peer-to-peer module is configured to cause a generation of a supply medium exchange release message for releasing of the exchange of the supply medium between the mobile unit and the supply medium exchange station by means of the peer-to-peer application.