Abstract: The subject matter relates to a method for creating a supplier data set containing information about a service supplier. A new tariff can be offered to the user by receiving an electronic copy of a bill from a client via a wide area network, extracting from the copy of the bill at least data characterizing the bill, comparing at least part of the extracted data characterizing the bill with bill templates stored within a database to determine a current type of tariff, analyzing the current type of tariff, and preparing the supplier data set based on the result of the analyzation.