TRANSACTION METHOD AND SELLING SYSTEM

Proposed is a transaction method between a customer and one of a plurality of service terminals (4) which supply selectable products and/or services, subject to costs, on location, as well as a sales system for carrying out the transaction method, whereby, by means of a portable mobile device (1) of the customer, an order record (6), comprising a service terminal identification (62) of the service terminal (4), is transmitted via a mobile radio network (2) to a service center (3), the service center (3) checking the credit worthiness of the customer from whom the order record was transmitted, and, in the case of positive credit worthiness, transmitting a credit record comprising a credit value via a communication network (2′) to the service terminal (4) identified through the service terminal identification (62), and whereby, on the basis of the received credit record, the service terminal (4) releases the selection of a product and/or of a service and supplies the desired product or the desired service corresponding to the selection made by the customer, and a supply confirmation comprising a cost amount for the supplied product or the supplied service is transmitted to the service center (3) which debits the cost amount to an account of the customer.