address registration foreigner Korea living in Korea healthcare Korea billing error foreigners Korea address reporting korea foreigner NHIS Korea foreign residents mobile banking Korea job loss mistakes Korea foreigner HiKorea address report Korean bank account national health insurance korea foreigners address registration risk Korea local office foreigners Korea foreign resident bills Korea housing problems after job loss Korea insurance after unemployment Korea dependent insurance Korea address change Korea local office notices foreigners Korea foreign resident tax Korea moving in Korea bank account Korea foreigner expat tax risk Korea ARC bank account Korea foreign resident bills korea overpay insurance utilities korea fix billing health insurance bill Korea foreign resident Korea foreign resident fine korea health insurance foreigners korea ARC address change