The era of colonialization of the Dutch East Indies began to end together with the entry of Japan into Indonesian territory in 1942. However, during the Japanese occupation there were almost no fundamental changes in immigration regulations. In other words, during the Japanese occupation, the Dutch East Indies immigration law product was still used. The existence of the importance of immigration regulations reached its momentum when Indonesia proclaimed its independence on August 17, 1945.

There are 4 (four) important events after the proclamation of independence of the Republic of Indonesia related to immigration, namely: (1) Repatriation of APWI and Japanese soldiers; in this event it was marked by the transport of ex APWI and disarmament and transportation of Japanese soldiers in Central Java in particular, on the island of Java and Indonesia generally, which was handled by the Japanese Stamps Oeroesan Committee (POPDA); (2) Barter activities, purchase of weapons and airplanes; during the Independence Revolution the fighters often traveled abroad, for example entering Singapore and Malaysia, still without passports; (3) Diplomacy Struggle; beginning with the holding of the Inter Asian Conference in New Delhi. On this occasion the Indonesian Ministry of Foreign Affairs finally succeeded in issuing a "Certificate deemed as a passport" as the first document of interstate travel after independence for the legitimate Indonesian government mission at the conference. The Indonesian delegation led by H. Agus Salim joined in introducing the Indonesian government's "Diplomatic Passport" to the international world; and (4) Immigration in Aceh; Aceh as the only Indonesian territory which the Dutch never occupied, since 1945 has established an immigration office in five cities and continues to operate during the independence revolution. The establishment of an immigration office in Aceh since 1945 was by Amirudin. The event was quite important at this time, the Immigration Bureau which had been under the Ministry of Justice from the beginning, had once changed to become under the authority of the Ministry of Foreign Affairs.

In addition, to overcome the legal vacuum, the immigration laws and regulations of the products of the Dutch East Indies government must be revoked and replaced with legal products that are in line with the spirit of independence. During the independence revolution there were two Dutch Indies legal products related to immigration, which were revoked, namely (a) Toelatings Besluit (1916) was changed to Determination of Entry Permits (PIM) included in State Gazette Number 330 of 1949, and (b) Toelatings Ordonnantie ( 1917) was changed to an Entry Permit Ordinance (OIM) in the State Gazette Number 331 of 1949. During the independence revolution the immigration institution still used the organizational structure and work procedures of the Immigration Service (Immigratie Dients) inherited from the Indies.