North Korea had no formal nationality law before 1963, but this situation did not cause any issues for the country.
North Korean nationality law details the conditions in which an individual is a national of the Democratic People's Republic of Korea (DPRK), commonly known as North Korea. This led to situations which were quite unusual from the perspective of international law, most notably the Soviet Union's unilateral declaration that the Sakhalin Koreans were DPRK citizensin effect, one sovereign state granting its residents the citizenship of another sovereign state, presumably without any consultation. Until 1963, the DPRK had no formal nationality law. 
