Central Agent Authorisation Team: enquiries
Write to HMRC for client authorisation using paper form 64-8.
Post
Send your 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.
Couriers should use a different address.
National Insurance Contributions and Employer Office
HM Revenue and Customs
BX9 1AN
United Kingdom
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Agent authorisation: apply using HMRC paper forms
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Updates to this page
Published 14 May 2025