Letter of authority – template
Name the person you authorise, the organisation and what they may do. The letter can be limited to a set date.
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What next?
Letter of authority – what you need to know
A letter of authority lets someone else deal with an organisation for you – for example a relative speaking to your energy supplier, bank or council, or collecting a parcel or documents. It is quick and free, and most organisations accept it for everyday matters.
What to include
- your full name, address and any account or reference number
- the full name of the person you authorise and, ideally, how you know them
- exactly what they may do – the narrower, the more likely it is to be accepted
- an end date, if the authority is for a limited time
Letter of authority or power of attorney?
A letter of authority is for specific, everyday tasks. It is not a lasting power of attorney (LPA). If someone needs to manage your finances or make decisions for you if you lose mental capacity, you need an LPA registered with the Office of the Public Guardian.
Tips
Many banks and HMRC have their own third-party authority forms – check first. Send a copy of your ID if the organisation asks, and keep a copy of the letter.
Frequently asked questions
Does a letter of authority need to be witnessed?
Usually not. Some organisations ask for a witness or their own form for financial matters, so check their requirements.
Can I cancel the authority?
Yes, at any time, by telling the organisation in writing.
Is a letter of authority valid if I lose mental capacity?
No. For that situation you need a registered lasting power of attorney.
This template is for general information and is not legal advice. It reflects the law of England and Wales as at October 2026. Check that it fits your situation before signing and take legal advice in unusual cases.