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