Use this form if you are a stateless person (not recognised as a national of any country) and want to register as a British citizen (this covers forms S1, S2 and S3).
You cannot apply online if you live in the Channel Islands, on the Isle of Man or in a British Overseas Territory. You should download and complete the paper form.
Before you apply
Before you begin, read the guidance for forms S1, S2, S3 to find out about eligibility.
How long it takes you to complete the application will depend on your particular circumstances. You will be able to save your application and come back to it at another time if you need to.
If you are inactive for 25 minutes you will be automatically logged out.
How we use your data
The Home Office will use the personal information you provide to consider your application. We may also share your information with other public and private sector organisations in the UK and overseas. For more detail please see the Privacy Notice for the Border, Immigration and Citizenship system. This also sets out your rights under the Data Protection Act 2018 and explains how you can access your personal information and complain if you have concerns about how we are using it.