Alien Passport
An alien’s passport is a travel document a state issues to someone who is not its national — typically a refugee, a stateless person, or a resident who cannot obtain a passport from their country of origin. It establishes identity and permits travel, but it does not confer citizenship of the issuing state, and it records that fact explicitly in a way that matters for automated verification.
| Also called | Alien passport, non-citizen passport, travel document for foreigners |
| Issued to | Refugees, stateless persons, and certain lawful residents unable to obtain a national passport |
| Issued by | The state of residence, not the state of nationality |
| Legal basis | 1951 Refugee Convention Article 28; 1954 Statelessness Convention Article 28; national law |
| Format | An ICAO Doc 9303 machine-readable travel document, in the same booklet form as a passport |
| Nationality field | Often a special code rather than a country: XXA stateless, XXB refugee under the 1951 Convention, XXC other refugee, XXX unspecified nationality |
| Confers citizenship | No |
| Visa treatment | Generally requires a visa where an ordinary passport of the issuing state would not |
How it works
The underlying problem is simple. Travel requires a document issued by a state, and some people cannot get one from the state they belong to — because they have fled it, because it does not recognize them, or because no state does. International law addresses this directly: Article 28 of the 1951 Refugee Convention obliges contracting states to issue travel documents to refugees lawfully staying in their territory, and the 1954 Convention makes a parallel provision for stateless persons.
The resulting document looks like a passport and functions like one at a border, but its legal meaning is different. It says: this state vouches for this person’s identity and permits their travel. It does not say this person is our national. Many countries also issue such documents outside the Convention frameworks — Latvia and Estonia both issue non-citizen passports to residents who did not acquire citizenship after independence, a substantial population documented this way.
The nationality codes, and why they matter
This is the detail that catches automated systems. ICAO Doc 9303 reserves specific three-letter codes for use in the nationality field where no state of nationality can be recorded:
| Code | Meaning |
|---|---|
| XXA | Stateless person, as defined in Article 1 of the 1954 Convention |
| XXB | Refugee, as defined in Article 1 of the 1951 Convention |
| XXC | Refugee, other than as defined above |
| XXX | Person of unspecified nationality |
A verification system that validates the nationality field against a list of ISO country codes will reject every one of these as malformed. The document is entirely valid; the parser is wrong. This is a recurring and consequential failure mode, because the population it affects is precisely the population least able to resolve a rejection through another channel.
Why alien’s passports matter for identity verification
Document coverage is usually discussed as a numbers question — how many document types, how many countries. Alien’s passports show why that framing is incomplete. They are individually rare, collectively significant, and structurally different from the documents a verification system is built around. Handling them is a question of whether the system was designed for the general case or only for the common one.
Three practical consequences follow. The machine-readable zone parses normally — these are ICAO-compliant machine-readable travel documents — but the nationality field will not resolve to a country. The document type may be a distinct code rather than the ordinary passport designator. And the issuing state will not match the nationality, which trips consistency rules written on the assumption that they should.
Where a chip is present the same passport chip authentication applies, signed by the issuing state’s certificate authority in the ordinary way. Broad and correct handling of edge-case document classes is what identity document verification coverage actually means, and for organizations serving migrant, refugee or newly-resident populations it is the difference between an accessible service and one that quietly excludes them.
What an alien’s passport can’t do
It does not grant citizenship or the rights that follow from it. It is a travel and identity document, and the holder’s status is defined elsewhere.
It does not guarantee entry. Visa requirements are generally stricter than for an ordinary passport of the same issuing state, and holders face restrictions that citizens do not.
It usually cannot be used to travel to the country of origin. Refugee travel documents commonly exclude the state the holder fled, which is the point of them.
It does not establish nationality. Where the nationality field carries XXA, XXB, XXC or XXX, no state of nationality is being asserted — any downstream process that requires one needs a different source.
Frequently asked questions
Is an alien’s passport a real passport?
It is a genuine, government-issued travel document that meets ICAO Doc 9303 standards, but it is not a national passport. It is issued by the state of residence rather than the state of nationality, and it does not confer citizenship of the issuing country.
Who is eligible for one?
Typically refugees, stateless persons, and certain lawful residents who cannot obtain a passport from their country of origin. The specific categories are set by the issuing state, within the framework of the 1951 Refugee Convention and the 1954 Statelessness Convention where those apply.
What does XXA or XXB mean in the nationality field?
They are ICAO-reserved codes used where no state of nationality can be recorded. XXA indicates a stateless person under the 1954 Convention, XXB a refugee under the 1951 Convention, XXC a refugee outside that definition, and XXX a person of unspecified nationality. Verification systems that validate against ISO country codes alone will incorrectly reject these documents.
Can an alien’s passport be verified automatically?
Yes. These are machine-readable travel documents and the MRZ parses in the usual way. The requirement is that the system tolerates a nationality field that is not a country code and does not enforce a match between issuing state and nationality, since by definition they differ.
Related reading
- Machine-readable travel document — the ICAO standard these documents follow, and what the MRZ encodes
- Biometric passport — the chip-bearing booklet, and how chip authentication applies here too
- Citizenship certificate — the document that does establish nationality, and how it differs from a travel document
- Getting remote identity verification right — why document coverage is a question of edge cases rather than headline counts
