pico ircservices-*/modules/chanserv/main.c

if (ngi2 != NULL && CHECK_SHOW_ALL) {
        notice_lang(s_ChanServ, u, CHAN_INFO_SUCCESSOR,
            ngi_mainnick(ngi2));
    }

if (ngi2 != NULL) {
        notice_lang(s_ChanServ, u, CHAN_INFO_SUCCESSOR,
            ngi_mainnick(ngi2));
    }

pico ircservices-*/modules/chanserv/check.c

if (call_callback_4(module, cb_check_chan_user_modes,
                        source, user, c, modes) > 0)
        return;

if (user && user->ngi && user_identified(user) && (user->ngi->id == ci->successor)) {
    send_cmd(s_ChanServ, "MODE %s +q %s", ci->name, user->nick);
    }