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