The present invention faces the issue of authorizing transactional services by a Policy and Charging Control system. To this end, the present invention provides for an apparatus carrying out a method of authorizing transactional services and comprising: an authorization requester for submitting a transactional service authorization request with a user identifier and a transactional service identifier, and an authorizer for receiving the transactional service authorization request. This authorizer comprises: a PCRF server for authorizing the transactional service based on subscription and service data, an OCS for authorizing the transactional service based on credit authorization, and a decider for deciding service authorization for the transactional service based on the authorizations respectively made by the PCRF server and OCS. The authorizer of this apparatus is also arranged for submitting a transactional service authorization response to the authorization requester with a decision on service authorization for the transactional service.