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The short answer
Inside Nigeria an age declaration affidavit is an accepted substitute: NIS takes a High Court age declaration in place of an NPC birth certificate for passports, and NIMC lists a declaration of age among enrolment documents. Abroad it is weaker: the US State Department's civil documents list for Nigeria names the NPC certificate and alternatives such as an NPC attestation, hospital, local government or baptismal certificate, and the Belgian Embassy accepts a declaration of age only alongside an NPC attestation and verification letter.
What an age declaration is
A declaration of age is a sworn statement, usually by the person or a parent or older relative, of when and where someone was born. It is sworn before a court officer or Commissioner for Oaths and carries a court stamp. It exists because many Nigerians born before universal registration have no birth certificate. A 2011 Canadian research report quoting NPC said adult attestations of birth are themselves backed by a High Court declaration of age.
Where it works: Nigerian agencies
| Agency | What it accepts | Source |
|---|---|---|
| NIS (passport) | NPC birth certificate or High Court age declaration | NIS Service Level Agreement 2026 |
| NIMC (NIN) | Declaration of age among the documents for enrolment | NIMC NIN issuance page |
| Nigerian missions abroad | Atlanta lists age declaration among its consular services | Consulate Atlanta, about page |
So for Nigerian documents, an age declaration usually does the job, especially for people born before NPC certificates were widespread.
Where it struggles: foreign authorities
Foreign immigration, pension and civil registration offices want documents they can verify. A self-declared date, sworn decades after the birth, is the opposite. Two published lists show the pattern:
- United States. The State Department's reciprocity page for Nigeria lists the NPC Certificate of Birth as the birth document, accepts NPC's Attestation of Birth Certificate for births before 1979, and lists alternatives such as a local government or hospital birth certificate or a baptismal certificate. It does not list an age declaration on its own.
- Belgium. The Belgian Embassy in Abuja asks, for an attestation of birth, the original attestation, an NPC verification letter, the original statutory declaration of age and ID. The declaration travels with the attestation, not instead of it.
Other countries publish their own lists; read the one for the application you are making. Where an authority allows secondary evidence, an age declaration helps most when it sits alongside something older: a school record, a baptismal certificate, or an early passport.
Making an age declaration that stands up
- Who swears it. The person whose age it is, or a parent or older relative with personal knowledge of the birth.
- Where. Section 110 of the Evidence Act, as summarised in that 2014 report, allows affidavits sworn abroad before a judge, magistrate, notary or an authorised officer at a Nigerian mission.
- What it says. Full name in passport order, date and place of birth, parents' names, and how the deponent knows.
- Consistency. The date must match your NIN and passport. A new date in a new affidavit creates the very conflict foreign officers look for.
- Authentication. For use abroad, Nigerian documents generally go through the Ministry of Foreign Affairs first; the Belgian Embassy says MFA authentication is valid for six months. See MFA authentication by proxy.
An example
Example: Tunde was born in Ibadan in 1974 and has never had a birth certificate. His Nigerian passport was issued on a High Court age declaration his mother swore in the 1990s. He now lives abroad and is applying for a residence document that asks for a birth certificate.
- For his Nigerian passport renewal, the old declaration is still the right document: NIS accepts it.
- For the foreign application, he first reads the authority's document list. If it allows substitutes, he submits the declaration with his oldest records showing the same date, such as a school leaving certificate.
- If it asks for a registrar-issued document, he applies for an NPC attestation using the same date, has it authenticated, and submits that with the declaration.
The constant through all three is the date. It never changes.
Better: get the NPC attestation
If you were born in Nigeria and have no certificate, the stronger document is NPC's attestation of birth, which uses your declaration as its basis but is issued by the registrar and can be verified with NPC. The steps are in NPC attestation for an adult abroad. For a parent applying for you, see affidavits sworn abroad. For which documents a foreign citizenship application may want, see Nigerian documents for citizenship abroad.
Quick check before you submit
- Does the authority's own list mention a declaration or affidavit at all? If not, ask before relying on one.
- Do you have any older record with the same date?
- Is the declaration authenticated, and is the authentication still in date?
- Do the names and date match your passport exactly?
This is general information, not immigration advice.
Questions people ask
Is a Nigerian age declaration accepted for a UK or US visa?
The US State Department's Nigeria list names the NPC certificate and alternatives such as an NPC attestation (for births before 1979), hospital, local government or baptismal certificates, not an age declaration alone. Check the specific authority's list for other countries.
Can I swear an age declaration abroad?
Section 110 of the Evidence Act allows affidavits sworn abroad before a judge, magistrate, notary or an authorised officer at a Nigerian mission.
Is an age declaration enough for a Nigerian passport?
Yes. NIS accepts a High Court age declaration in place of an NPC birth certificate.
Should I get an NPC attestation instead?
If you were born in Nigeria and have no certificate, the attestation is a stronger document because NPC issues it and can verify it.
Sources
- NIS: Service Level Agreement 2026 (Apr 2026) · accessed Oct 2026
- NIMC: NIN issuance · accessed Oct 2026
- Consulate General of Nigeria, Atlanta: About us · accessed Oct 2026
- US Department of State: Nigeria reciprocity and civil documents · accessed Oct 2026
- Embassy of Belgium in Nigeria: Legalisation of documents · accessed Oct 2026
- IRB Canada: Nigeria affidavits, RIR NGA104978.E (4 Nov 2014), via ecoi.net · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.