Method, system and devices for transferring accounting information

A method in a system for transferring accounting information, a system for transferring accounting information, a method in a terminal, a terminal, a method in an Extensible Authentication Protocol (EAP) service authorization server, an EAP service authorization server, a computer program, an Extensible Authentication Protocol response (EAP-response) packet, wherein the method: meters data related to a service used by at least one terminal, provides the metered data as accounting information to at least one Extensible Authentication Protocol (EAP) service authorization server, sends, by means of an Extensible Authentication Protocol request (EAP-request), a service authorization request from the at least one EAP service authorization server to the at least one terminal, digitally signs accounting information, in the at least one terminal, includes, at the at least one terminal, the digitally signed accounting information in an Extensible Authentication Protocol response (EAP-response), and sends the digitally signed accounting information to an AAA-server.