**Description** We are using ims_charging module and Freediameter as diameter server for billing process....recently we faced one issue...For Initial **INVITEs** kamailio sending **CCR request (INITIAL_REQUEST)** to **diameter server** but if we receive Immediate **CANCLE** for the **INVITE**, kamailio sending **CCR request ( TERMINATE_REQUEST )** without waiting for the **CCR request (INITIAL_REQUEST) response** from the **Diameter server.**.. **Expected behavior** Kamailio has to send **CCR request ( TERMINATE_REQUEST )** after getting the **response** from the **INITIAL_REQUEST.** **Additional Info** kamailio server : 4.2 platform : linux -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2143