
The British National (Overseas) passport, commonly referred to as the BN(O) passport, is a British passport for persons with British National (Overseas) citizenship. BN(O) citizenship was created in 1987 after the enactment of Hong Kong Act 1985. BN(O) citizens are permanent residents of Hong Kong who were British Dependent Territories citizens until 30 June 1997, and chose to remain British by registering for BN(O) citizenship when Hong Kong was under British administration.

British nationality law as it pertains to Hong Kong has been unusual ever since Hong Kong became a British colony in 1842. From its beginning as a sparsely populated trading port to today's cosmopolitan international financial centre and world city of over seven million people, the territory has attracted refugees, immigrants and expatriates alike searching for a new life.

The Hong Kong Certificate of Identity (CI) was a formal travel document and passport, issued by the Hong Kong Government's Immigration Department until 30 June 1997. It is no longer possible to possess a valid CI as a travel document, as all CIs have expired by 30 June 2007, though most CI holders should be eligible to hold the HKSAR Passport.

The Hong Kong Special Administrative Region of the People's Republic of China passport is a passport issued only to permanent residents of Hong Kong who also hold Chinese citizenship. In accordance with the Basic Law of the Hong Kong Special Administrative Region, since the transfer of sovereignty on 1 July 1997, the passport has been issued by the Immigration Department of the Government of Hong Kong under the authorisation of the Central People's Government of the People's Republic of China. As the official languages of Hong Kong are Chinese and English, the passport is printed bilingually in both Chinese and English.

A Mainland Travel Permit for Hong Kong and Macao Residents, also colloquially referred to as a Home Return Permit or Home Visit Permit, is issued to Chinese nationals who are permanent residents of or settled in Hong Kong and Macau as the travel document to Mainland China. The permit is issued by the Exit and Entry Administration of the People's Republic of China through China Travel Service sub-branches in Hong Kong and Macau and allows holders to travel freely to Mainland China.

The Residence Permit for Hong Kong, Macao, and Taiwan Residents is an identity document in the People's Republic of China. It is issued to Chinese nationals who do not have household registration in mainland China and are permanent residents of Hong Kong, Macau, or Taiwan, have lived in mainland China for over half a year, and either have a stable job, a stable domicile or attend school continuously in mainland China. Applications for this card first opened on 1 September 2018.

A People's Republic of China Permit for Proceeding to Hong Kong and Macao, or One-way Permit, is a document issued by the People's Republic of China allowing residents of mainland China to leave the mainland permanently to settle in Hong Kong or Macau.