Central Agent Authorisation Team
Send a client authorisation form 64-8 by post to HMRC.
Post
Send your paper 64-8 form to this address. Make sure you check the guidance on the form first, in case you need to post it to a different address.
You do not need to include a street name or PO box when writing to this address.
National Insurance Contributions and Employer Office
HM Revenue and Customs
BX9 1AN
United Kingdom
Find out the address to use if you’re using a courier instead of Royal Mail.
Related content
Guidance
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Agent authorisation: apply using HMRC paper forms
- Authorising an agent to deal with your tax affairs