Abstract: Aspects of the invention relate to a computer-implemented method and system of permitting or denying service for a user device of a user of a service in relation to a recipient, who is the counterparty, is proposed. The method is executed in a system configured for connecting to the user device. The system is configured for accessing a recipient requirement list of the recipient and a user profile of the user. The recipient requirement list comprises at least one criterion regarding an item of said user profile. A service request is received from the user device. The service request contains an identifier of the recipient. The recipient requirement list is traced on the basis of this identifier. Subsequently, it is checked whether an item of the user profile satisfies the at least one criterion of the traced recipient requirement list. Service is permitted if the item of the user profile satisfies said at least one criterion of said recipient requirement list.