@Kim ****
Though to clarify it’s actually saying the Thai hotelier or Thai housemaster that the foreign person is staying with must register the foreigner within 24 hours of their arrival in Thailand 🇹🇭 Not the actual foreign person, though I feel this poster should be displayed in English language as well, otherwise the hotel or Thai you are staying with gets fined upto 10.000 Baht and the foreigner 2.000 Baht if the online registration isn’t completed in 24 hours of arrival.