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