How to Write a Letter Before Action (UK)

Updated for England, Wales, and Northern Ireland. Covers Pre-Action Protocols, evidence, tone, and next steps.

Before you start a civil claim — whether it's an unpaid invoice, a deposit dispute, or a breach of contract — you almost always need to send a letter before action (LBA). In England and Wales, it's a formal step required by the Pre-Action Protocols. In Northern Ireland the expectation is similar. Done properly, an LBA resolves the dispute without court. Done badly, it can weaken your position later.

When do you need a letter before action?

Send an LBA when:

• Someone owes you money and won't pay
• A supplier has breached a contract
• A tenant or landlord has failed to meet obligations
• You need to put a dispute on record before Small Claims

For consumer disputes, use the relevant ombudsman or alternative dispute resolution first. For most other civil disputes, the LBA is the formal starting gun.

What to include in a letter before action

The courts expect a clear, factual letter. Include:

1. Your details and the recipient's details — names, addresses, account/case references.
2. A summary of the dispute — what happened, when, and why you say the other side is liable.
3. The amount claimed or the action demanded — be specific. "£1,247.50 outstanding for invoice #1023" is stronger than "some money".
4. A breakdown of costs — principal, interest if applicable, and any fixed costs.
5. A deadline to respond — 14 days is standard, but longer periods are common for complex matters.
6. The consequence of non-response — that you will issue proceedings in the County Court.
7. Enclosures — copies of supporting documents. Never send originals.

Tone and legal accuracy

Keep it firm but professional. Emotion rarely helps in legal correspondence. Stick to facts, dates, and amounts. Avoid threats you can't back up, and don't make allegations you can't prove.

How long should they have to respond?

The Pre-Action Protocols vary by dispute type. The general commercial protocol allows at least 14 days. Construction, professional negligence, and some consumer claims recommend longer — often 28 days. If you're unsure, use 14 days and say you'll issue proceedings if no substantive response is received within that period.

What if they respond?

A response may admit the debt, offer a payment plan, or dispute liability. If they offer to pay in instalments, consider whether the offer is realistic. If they dispute liability, gather evidence and try to narrow the issues before court. Court should be a last resort.

What if they ignore the letter?

If the deadline passes with no response, you can issue a claim via Money Claim Online (MCOL) or the County Court paper process. Include the LBA and any reply as exhibits. Your LBA becomes part of the evidence bundle.

Common mistakes that undermine your case

• Sending a vague or threatening letter with no factual basis
• Failing to give a reasonable response time
• Not keeping a copy and proof of postage
• Making settlement demands that exceed what you can justify
• Breaching data protection when sending supporting documents

Key case law and rules

The relevant frameworks include CPR Part 31 (disclosure), CPR Part 36 (offers to settle), and the relevant Pre-Action Protocol. The overarching aim is proportionality: courts want parties to exchange information early and try to settle without a hearing. Ignoring pre-action requirements can lead to cost penalties even if you win at trial.

Ready to draft yours?

Writing a letter before action by hand takes time and carries risk if you miss a detail. You can generate a tailored UK letter before action in minutes through LawImNotSure — the first document is free with signup.

What evidence should you attach?

Strong evidence wins cases. Attach: the contract or invoice, proof of payment, photos or screenshots of the fault, a timeline of messages, and any earlier complaint. Send copies only — never originals. If your dispute concerns goods, link it to your faulty-goods rights; if a landlord or tenant, see the tenant complaint guide. A clear paper trail also supports a later subject access request to see what the other side holds.

Frequently asked questions

Do I need a lawyer to send a letter before action?

No. You can write it yourself. Courts expect a clear, factual summary of the claim, the amount, and the deadline — not legal wording. Our generator produces a court-ready letter in minutes.

What happens if I skip the letter before action?

The court can order you to pay the other side's costs even if you win, because you did not try to resolve the dispute first. It is a required step in most civil claims.

How long is a letter before action valid as evidence?

It stays part of your evidence bundle for the whole claim. Keep the sent copy and proof of delivery; judges routinely ask to see it.