If you’ve recently become a British citizen – or you’re preparing to apply – you may have come across two similar-sounding documents: the Certificate of Naturalisation vs Registration Certificate. Both confirm British citizenship, but they are issued through different legal routes and to different groups of people.
Understanding which certificate applies to you matters – especially when you need to apply for a British passport, prove your right to work, or have your documents Notarized or Apostilled for use abroad.
In this guide, we explain the key differences, who receives which certificate, and what to do if yours is lost or damaged.
What Is a Certificate of Naturalisation?
A Certificate of Naturalisation is an official document issued by the Home Office confirming that an individual has become a British citizen through the process of Naturalisation. This is the standard route for adults who were not born British but have lived lawfully in the UK for a qualifying period.
To qualify for Naturalisation, applicants typically need to be at least 18 years old, have held settled status (such as Indefinite Leave to Remain or EU Settled Status) for at least 12 months, have lived in the UK for five years (or three years if married to a British citizen), pass the Life in the UK Test, and demonstrate sufficient knowledge of English, Welsh or Scottish Gaelic.
The application is made using Form AN, and the current fee is £1,735 (including the citizenship ceremony fee). Processing typically takes up to six months. Once approved, the applicant attends a citizenship ceremony where they take the Oath of Allegiance and receive their Certificate of Naturalisation.
What Is a Certificate of Registration?
A Certificate of Registration is issued to individuals who become British citizens through registration rather than Naturalisation. Registration is a separate legal route that applies to people with existing ties to the UK – most commonly children born to British parents abroad, or individuals from British Overseas Territories.
Registration is typically available to children under 18 who have a British parent, individuals born in a British Overseas Territory, people who were previously British citizens but lost their citizenship (for example, due to historical laws around gender or marriage), and certain Commonwealth citizens with the right of abode.
The eligibility criteria and required documentation vary depending on the specific registration route, but the key difference is that registration often does not require meeting the same residence or language requirements as Naturalisation.
Key Differences at a Glance
While both certificates serve as legal proof of British citizenship and grant the same rights (including the right to hold a British passport, work without restrictions, and access public services), the differences lie in how and to whom they are issued.
Certificate of Naturalisation: issued to adults who apply through the standard Naturalisation route. Requires meeting residence, language and Life in the UK Test requirements. Application via Form AN.
Certificate of Registration: issued to individuals who qualify through registration – often children of British nationals, people from British Overseas Territories, or those restoring lost citizenship. Different eligibility criteria; residence and language requirements may not apply.
Both certificates: provide the same legal status as a British citizen. Both can be used to apply for a British passport and prove right to work. Both are issued by UK Visas and Immigration (UKVI) on behalf of the Home Office.
What Does a Certificate of Naturalisation Look Like?
A Certificate of Naturalisation follows a standard format set by the Home Office. It includes the holder’s full name, date of birth, country of previous nationality, the date citizenship was granted, a unique certificate number (found at the bottom of the document near the issue date), and the signature of a Home Office official.
It is important to check all details on your certificate at the time of issue. Errors must be reported to the Home Office, and corrections may involve a fee if the mistake was caused by incorrect information provided by the applicant.
Replacing a Lost or Damaged Certificate
If your Certificate of Naturalisation or Registration is lost, stolen or damaged, you can apply for a replacement through UKVI. The process is the same for both certificate types.
If you were naturalised or registered after 30 September 1986: apply online using Form NC (Application for Duplicate Citizenship Certificate). The current fee is £428. If your certificate was stolen, report it to the police before applying.
If you became a citizen before October 1986: UKVI does not hold records from this period. Instead, you can search the National Archives and order a certified copy of your original certificate.
Important: keep your original certificate safe. Do not laminate it – HM Passport Office will not accept laminated certificates as proof of citizenship. Store it in a secure, dry place and use certified copies for day-to-day purposes wherever possible.
When Might You Need Your Certificate Notarized or Apostilled?
For most UK-based processes – such as applying for a British passport or proving your right to work – the original certificate or a certified copy is sufficient. However, if you need to use your certificate internationally, additional authentication may be required.
Common scenarios where Notarization or an Apostille may be needed include employment abroad, overseas property transactions, visa and residency applications in other countries, and university admissions abroad.
An Apostille authenticates the document for use in countries that are part of the Hague Apostille Convention. For countries outside the Convention, embassy legalisation may be required instead.
If you need your Certificate of Naturalisation or Registration Notarized or Apostilled, NotaryPublic24 can help. Visit our Certificate of Naturalisation page to get started – the entire process is handled online.
Frequently Asked Questions
Is a Certificate of Naturalisation the same as a British passport?
No. The Certificate of Naturalisation proves your British citizenship, but it is not a travel document. You need to apply for a British passport separately once you have received your certificate.
Can I use a certified copy instead of the original?
For most official purposes – such as applying for a passport – only the original certificate is accepted. However, a Notarized certified copy is widely accepted for employment checks, legal proceedings and international use.
Do Naturalisation and Registration Certificates grant different rights?
No. Both certificates confirm full British citizenship. The holder of either certificate has the same legal rights, including the right to live and work in the UK, vote, and hold a British passport.
How much does it cost to replace a lost certificate?
The current UKVI fee for a replacement certificate is £428. This applies to both Naturalisation and Registration Certificates issued after 30 September 1986.
What should I do if there is an error on my certificate?
Download and complete the RR form (Application for Correction) from the GOV.UK website and send it to UKVI along with your original certificate. If the error was made by UKVI, there is no fee. If the error was based on information you provided, a £428 correction fee applies.
Do I need to return my Biometric Residence Permit (BRP) after receiving my certificate?
Yes. You must return your BRP to the Home Office within five working days of receiving your citizenship certificate. Failure to do so may result in complications with your immigration records.
Summary
Both the Certificate of Naturalisation and the Certificate of Registration serve as legal proof of British citizenship. The difference comes down to the route: Naturalisation is for adults who meet residence and language requirements, while Registration covers children, those with historical ties to the UK, and individuals restoring lost citizenship.
Whichever certificate you hold, keep it safe, avoid laminating it, and consider having a certified copy made for everyday use. If you need your certificate authenticated for use outside the UK, NotaryPublic24’s Notarization and Apostille services can handle the process entirely online.