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Form: Become a British citizen by naturalisation (form AN)

Uk Visas Immigration

May 21
10:09 2024

If you do not live in the Channel Islands, Isle of Man or a British Overseas Territory, you can apply online.

You can get help to make your online application if you are in the UK and you do not have the appropriate access, skills or confidence to complete an online immigration application form.

Use this paper form if you live in the Channel Islands, Isle of Man or a British Overseas Territory, and want to apply for British citizenship by naturalisation.

You can also use this paper form if you live elsewhere and want to apply by post. You will need to submit your documents with your application.

Most people who live in the UK and apply online are able to keep their documents while their application is processed.

You should read:

Send the form and payment slip (including the fee) and your documents to:

  • the Lieutenant Governor if you are in the Channel Islands or Isle of Man
  • the Governor of the territory if you are in a British Overseas Territory
  • UK Visas and Immigration at the following postal address if you live elsewhere:

Department 1
UK Visas and Immigration
The Capital Building
New Hall Place
Liverpool
L3 9PP

We are aware this publication may have accessibility issues. We are reviewing it so that we can fix these. Read more about our accessible documents policy

Published 12 April 2019
Last updated 21 May 2024 +show all updates
  1. Question 5.1 in the form has been updated.

  2. Updated form to reflect Nationality and Borders Act changes coming into effect on 28 June 2022.

  3. Updated form published.

  4. The guidance has been updated to reflect a name change from NARIC to Ecctis.

  5. Removed outdated form.

  6. Uploaded guidance for December 2020.

  7. Updated form with a new version.

  8. Applying by post is taking much longer than applying online because of coronavirus (COVID-19). It is taking longer than usual to process applications because of coronavirus. This will not affect the decision.

  9. Form updated.

  10. Minor updates have been made to the form.

  11. First published.

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