Form

Become a British citizen by naturalisation (form AN)

Apply for citizenship by naturalisation if you live in the Channel Islands, Isle of Man, a British Overseas Territory or if you live elsewhere and want to apply by post.

• From: UK Visas and Immigration
• Published: 12 April 2019
• Last updated: 29 January 2025 — See all updates

Documents

Become a British citizen by naturalisation (form AN)

PDF, 769 KB, 29 pages

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Details

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:

• the AN guidance to check if you can apply
• the nationality forms guide to help you fill in the form

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 29 January 2025 + show all updates

1. 29 January 2025

   Updated form published.

2. 31 October 2024

   This form has been updated for use on or after 31 October 2024.

3. 21 May 2024

   Question 5.1 in the form has been updated.

4. 28 June 2022

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

5. 1 July 2021

   Updated form published.

6. 6 April 2021

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

7. 31 December 2020

   Removed outdated form.

8. 18 December 2020

   Uploaded guidance for December 2020.

9. 17 June 2020

   Updated form with a new version.

10. 16 April 2020

    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.

11. 1 October 2019

    Form updated.

12. 26 June 2019

    Minor updates have been made to the form.

13. 12 April 2019

    First published.