Hello Daniel! Thanks for your prompt reply, greatly appreciated! I can confirm that your solution works, but with a slight modification to the `record_route()` function to get rid of the error: ``` ERROR: <core> [core/msg_translator.c:3355]: sip_msg_apply_changes(): cannot apply msg changes after adding record-route header - it breaks conditional 2nd header ``` The solution of storing the `Identity` header in a separate variable and using it with the `append_to_reply()` function is the perfect solution for me, so I'll be looking forward to the implementation.