To update your address or any other contact details on the Anthony Nolan register, you can follow these steps:

1. Use our Donor Portal: https://donor-portal.anthonynolan.org. If you haven't used it before you’ll need to create an account. You'll need your donor number, which can be found on emails you’ve received from Anthony Nolan.
2. If you are experiencing issues with the portal, please send an email to register.support@anthonynolan.org with the following information: Full name, date of birth, address, and any new details that you want to update.  
3. Alternatively, you can call the Register Support team on 0207 424 6567.