There is no systematic declassification of government documents. Permission to view archival records is granted on a case by case basis.
Office of Vietnamese Ministry of Foreign Affairs: No. 1 Ton That Dam, Ba Dinh, Ha Noi.
National Archives Center I: 18 Vu Phan Ham, Phuong Yen Hoa, Cau Giay, Ha Noi. (Colonial Records)
National Archives II: 2 Le Duan, District 1, Ho Chi Minh City. (Republic of Vietnam Records)
National Archives III: 34 Phan Ke Binh, Ba Dinh District, Ha Noi. (Post-1945 records of the Democratic Republic of Vietnam)
Older records are divided between several National Archives sites in Hanoi and Ho Chi Minh City. For more recent records, contact the Ministry of Foreign Affairs. Researchers must acquire a reader’s card upon visiting the archives, which for foreigners will require photocopies of passport, visa and a letter from a sponsoring institution.