A landlord ignores three emails about a deposit. A supplier delivers the wrong stock and stops replying. A former client refuses to pay an invoice that was never disputed. In each case, the next sensible step is the same: a Letter Before Action. Done properly, it often ends the dispute. Done badly, it weakens your position before you have even issued a claim.
This guide explains what a compliant Letter Before Action looks like under the Civil Procedure Rules, what deadlines are reasonable, and where AI-drafted documents now save genuine lawyer hours without cutting corners.
What a Letter Before Action is actually for
A Letter Before Action — sometimes called a Letter Before Claim — is the formal notice you send to the other side before issuing court proceedings. It is not a threat. It is the document the court will look at if it later has to decide whether you behaved reasonably under the CPR pre-action protocol.
The Civil Procedure Rules expect parties to try to resolve disputes without litigation. There are specific protocols for certain claim types (debt claims against individuals, housing disrepair, personal injury, professional negligence, construction, and others), and a general Practice Direction on Pre-Action Conduct that catches everything else. The principles are similar across all of them:
- Tell the other side, clearly, what you say they did wrong.
- Tell them what you want.
- Give them enough information and time to respond properly.
- Be open to alternative dispute resolution.
If you skip these steps and rush to court, a judge can stay proceedings, refuse costs, or even penalise you on interest. That applies whether your UK civil claim ends up on the small claims track, fast track or multi-track.
What to include
A defensible Letter Before Action is not long, but it must be complete. The standard components are:
- Your details and theirs. Full legal names, addresses, and any reference numbers. For companies, the registered name and number.
- The basis of the claim. A short, factual chronology — what was agreed, what happened, what went wrong. Attach or refer to the key documents (contract, invoice, tenancy agreement, correspondence).
- The legal basis, in plain terms. You do not need to plead it like a barrister. "Breach of contract dated 14 March 2024" or "failure to repay the tenancy deposit" is usually enough.
- What you want. A specific sum, or a specific action (repair, delivery, refund, apology). If you are claiming interest, say so and identify the rate you rely on.
- A breakdown of the sum claimed. Principal, interest, and any costs or charges, itemised. Vague global figures invite disputes.
- A reasonable deadline to respond. See the next section.
- An invitation to engage in ADR. Mediation, negotiation, or an industry ombudsman where one exists.
- A warning of next steps. That if no satisfactory response is received, you reserve the right to issue proceedings without further notice, and that the letter may be shown to the court on the question of costs.
- Enclosures. Copies of the documents you rely on, or a list of them with an offer to provide copies on request.
For debt claims against individuals (including sole traders), there is a specific pre-action protocol that requires additional documents — notably an information sheet, a reply form and a standard financial statement. If your claim falls within it, those enclosures are not optional.
Setting deadlines that hold up
The single most common mistake in self-drafted letters is giving the other side too little time. Seven days sounds firm; in front of a judge, it looks impatient.
As a general guide:
- Consumer or simple contractual disputes: 14 days is the conventional minimum for a substantive response.
- Debt claims against individuals: 30 days from the date of the letter for a reply, under the relevant protocol.
- Complex disputes (professional negligence, construction, business-to-business with multiple issues): 14 days to acknowledge, with a longer window — often three months — to investigate and respond in full.
- Housing disrepair and personal injury: specific protocol timetables apply; do not shorten them.
Date the letter, send it by a method you can prove (recorded delivery, email with read receipt, or both), and keep the proof. If the deadline passes without a meaningful reply, you can issue — but consider one short chaser first. Judges notice restraint.
Where AI-drafted letters genuinely help
Until recently, a competent Letter Before Action meant either paying a solicitor for an hour or two of drafting, or downloading a generic template and hoping. AI legal documents have changed the middle ground. A well-built system can now:
- Identify which pre-action protocol applies based on the facts you describe.
- Produce a structured first draft with the right enclosures listed.
- Calculate interest correctly from the dates and rates you provide.
- Flag where your facts are thin and a solicitor's eye is genuinely needed.
The point is not to remove lawyers from the process. It is to remove the hours lawyers used to spend on the mechanical parts — chronology, formatting, interest maths, protocol selection — so their time goes to judgement: is the claim worth bringing, is the tone right, is there a defence you have not anticipated.
For most small claims track matters (currently disputes up to £10,000 for general claims), an AI-drafted letter reviewed briefly by a qualified solicitor is now a realistic, proportionate approach. For higher-value or specialist claims, the AI draft becomes a starting brief rather than a finished product — still useful, still a saving, but no substitute for advice.
A short checklist before you send
Before the letter leaves your outbox:
- Have you named the correct legal entity? (Sole trader, limited company, individual — they are not interchangeable.)
- Are the figures internally consistent across the body, the breakdown and any schedule?
- Have you attached or listed every document you rely on?
- Is the deadline realistic for the type of claim?
- Have you offered ADR in terms the other side can actually take up?
- Have you kept a clean, dated copy and proof of sending?
If you can answer yes to all six, you have a Letter Before Action that will read well to the recipient — and, if it comes to it, to a judge.
FAQ
Can I send a Letter Before Action myself without a solicitor? Yes. There is no rule requiring legal representation at the pre-action stage, and many consumers and small businesses do it themselves. The risk is procedural — missing a protocol requirement or setting an unreasonable deadline — rather than a prohibition.
What happens if the other side ignores my letter completely? Once your deadline has passed, you can issue a claim through the court (often online for money claims). Silence is not a defence; the court will proceed, and you can later show the unanswered letter on the question of costs and conduct.
Does a Letter Before Action stop the limitation clock? No. Sending the letter does not extend the limitation period for your claim. If you are close to the relevant limitation deadline, you need to issue proceedings in time regardless of where the correspondence has reached.
Serene Jade builds JustiScript, a UK legal-tech platform that drafts Letters Before Action and other pre-action documents under English law, with qualified solicitor review available when you want a second pair of eyes.