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