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