The present invention proposes a method for transmitting data in a communication network, said communication network comprising at least one call control entity (CSCF) for controlling calls to be established from a subscriber (A, B) to a communication destination (B, A), a service control entity (SCP) for controlling services provisioned in said network for a respective subscriber, and a detection entity (DP) adapted to detect at least one of a plurality of predetermined conditions occurring in said network; said method comprising the steps of: forwarding a signaling message from said subscriber (A) to said at least one call control entity (CSCF) for being further forwarded to said destination (B), said signaling message comprising a message header and a message body, said message header including information descriptive for a content carried in the message body, detecting the occurrence of said at least one predetermined condition, and in case the occurrence of said predetermined condition has been detected, sending information concerning the content carried in the message body of said signaling message to said service control entity (SCP). Also, the present invention proposes a communication system comprising a call control entity (CSCF) controlling calls to be established from a subscriber (A, B) to a communication destination (B, A), a service control entity (SCP) controlling services provisioned in a network for a respective subscriber, wherein said system is adapted to operate according to the above method, and also a call control entity and a service control entity as such.