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