Hi, I'm using the append_rpid_hf() command to add the remote party id. I've implemented it like this: modparam("auth", "rpid_prefix", "<sip:") modparam("auth", "rpid_suffix", "@xxx.xxx.xxx.xxx;user=phone>;party=calling;id-type=subscriber;screen=yes;privacy=off") [...] # first the caller needs to be authenticated if (uri=~"^sip:[0-9]*@(xxx.xxx.xxx.xxx|(voip1\.)?test\.com)") { if (!(src_ip==xxx.xxx.xxx.xxx | method==ACK | method=="CANCEL" | method=="BYE")) { if (!proxy_authorize("xxx.xxx.xxx.xxx", "subscriber")) { proxy_challenge( "xxx.xxx.xxx.xxx","0"); break; } else if (method=="INVITE" & !check_from()) { log(1, "LOG: Spoofed from attempt\n"); sl_send_reply("403", "Use From=id next time"); break; }; }; }; append_rpid_hf(); What I noticed is that sometimes ser sends it and sometimes not. I have a value in the rpid column of the user... Has anyone of you an idea why that happens?? Thanks! Sebastian