Hello Igor, these functions - isn't it what you need? remove_hf_re(hname_expr) [1] remove_hf_glob(hname_pattern) [2] 1. https://opensips.org/docs/modules/3.4.x/sipmsgops.html#func_remove_hf_re 2. https://opensips.org/docs/modules/3.4.x/sipmsgops.html#func_remove_hf_glob -- best regards, Alexey https://alexeyka.zantsev.com/