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