A letter of authority allowing an accountant, adviser, friend or relative to speak to HMRC on your behalf – with guidance on online agent authorisation, the 64-8 form, Trusted Helper and Lasting Power of Attorney, and a letter withdrawing authority.
Letters to HMRC & personal tax
Letter Authorising an Agent or Family Member to Deal with HMRC
About this document
HMRC will only discuss your tax affairs with someone else if you have authorised them. Professional agents usually use HMRC’s online authorisation through their agent services account. A friend or relative can be set up as a “Trusted Helper” online, or you can write a letter of authority for a specific issue.
The document is laid out in the sections below. Each one comes with a plain-English guidance note explaining what it does and what to change.
A complete, ready-to-use document with every section written, your details shown in [square brackets], and guidance notes explaining how to complete it.
Our templates are professionally structured starting points for UK businesses, not legal advice. For anything complex, unusual or high-value, have your final version checked by a solicitor.
Included in the pack
Letters to HMRC & personal tax
for every document in this category
Editable Microsoft Word files
Guidance notes in every document
Written for UK businesses
Download and keep
Need more than one category?
Documents All-Access gives you every category for 12 months for £295.
Compare options →Need it tailored?
We can adapt any template to your business, or write a document from scratch.
Talk to us →
