If productOffer(which in URL) is not NULL, the application shall validate any of mandatory pa-rameters is missing or any of optional parameters is conflicting the condition then the application shall raise log and a statistics value named “AMF-SMF Received DS3 Bad LDAP Search Response”. The ap-plication shall raise a ststistics value “AMF-SMF Return missing parameter” and return HTTP error re-sponse to the network element as bellow :