This is so absurdly extremely braindead nonsense, a random 3rd rate receptionist would not ever hold authority to blacklist anyone in any way or form, much less the countrys only sss rank adventurer, someone of his rank absolutely bare minimum would require the guilds and governments top brass to have a meeting for anything to happen as his license would absolutely be highly protected and carry far more authority then some pathetic 3rd rate receptionist or that 3rd rate loser in chapter 1, if anything, he would have near unquestionable authority to fire them on the spot and even get them arrested.