How to Write a Letter Before Action UK: A Complete Guide
A letter before action is the formal written warning you send before starting court proceedings. It tells the other party what you are claiming, why you are claiming it, what you want them to do, and what will happen if they do not respond. In England and Wales, sending one is not just good practice — in many cases it is a legal requirement under the Civil Procedure Rules, and failing to send one can cost you in court even if you win your case.
Despite its importance, a letter before action does not need to be written by a solicitor.
Thousands of people send them successfully every year in connection with unpaid invoices, faulty goods, landlord disputes, personal injury claims and consumer rights issues. What matters is that it contains the right information, uses the right tone, and gives the other party a genuine opportunity to resolve the matter before court. This guide explains how to write one that does all three.
What Is a Letter Before Action?
A letter before action — sometimes called a letter before claim or a pre-action letter — is a formal notice sent to the person or organisation you intend to take to court. It serves two purposes. First, it gives the other party a final chance to resolve the dispute without the cost and delay of litigation. Second, it satisfies the pre-action requirements of the Civil Procedure Rules, which govern how civil claims are handled in England and Wales.
Courts in England and Wales expect parties to have made genuine efforts to resolve their dispute before issuing a claim. If you skip this step, or if your letter does not contain what it should, the court can penalise you on costs — meaning you could be ordered to pay the other side's legal costs even if your underlying claim succeeds. Getting the letter right from the start protects your position.
When to Send a Letter Before Action
You should send a letter before action when you have a genuine legal claim against another person or organisation and earlier attempts to resolve the matter informally have failed. Common situations include:
Unpaid money: A business or individual owes you money and has not paid despite requests. This covers unpaid invoices, loans between individuals, refunds that have not been issued, and compensation you are owed.
Faulty goods or poor service: You purchased something that does not work as described, or paid for a service that was not delivered properly, and the seller or trader has refused to put it right.
Landlord disputes: Your landlord has failed to return your deposit without justification, has not carried out repairs they are legally required to make, or has deducted money from your deposit that you dispute.
Personal injury: You have been injured as a result of someone else’s negligence and they or their insurer has not accepted liability or offered adequate compensation.
Property damage: Someone has damaged your property and is refusing to pay for the repair or replacement.
Breach of contract: The other party has failed to honour the terms of an agreement, whether written or verbal, and you have suffered a loss as a result.
A letter before action is not appropriate where there is a genuine ongoing dispute about whether money is owed at all and you have not yet tried to resolve it directly. It is a step you take when you have made reasonable attempts to resolve the matter and the other party has either refused, ignored you, or made offers that are clearly inadequate.
The Pre-Action Protocols: What the Rules Require
The Civil Procedure Rules set out pre-action protocols for different types of claim. These are codes of conduct that parties are expected to follow before issuing court proceedings. The most relevant for everyday disputes are:
The Pre-Action Protocol for Debt Claims
If you are claiming an unpaid debt from an individual (not a business), the Pre-Action Protocol for Debt Claims applies. This protocol is more detailed than the general requirements and includes specific obligations. Your letter must include the amount of the debt, how it arose, a statement of account showing how the figure is calculated, and copies of key documents such as the contract or invoice. You must also enclose a standard information sheet, a reply form and a financial statement form (these are set out in the protocol and are available from the government’s court forms website).
The debtor has 30 days to respond. If they return the reply form, you must wait a further 30 days before issuing a claim, to allow time for them to seek debt advice or propose a repayment arrangement. Skipping these steps for a personal debt claim is taken seriously by the courts.
General Pre-Action Conduct
For most other civil disputes — breach of contract, faulty goods, property damage, landlord disputes — the Practice Direction on Pre-Action Conduct and Protocols applies. This is less prescriptive than the debt protocol but still requires you to send a clear letter setting out your claim, give the other party a reasonable time to respond (usually 14 to 28 days depending on the complexity), and make genuine efforts to resolve the matter before issuing a claim.
Courts expect both parties to act reasonably throughout the pre-action process. If the other party responds and proposes a reasonable settlement, you should consider it seriously. If you reject a reasonable offer and then win a similar amount in court, the court may still penalise you on costs for not settling earlier.
What a Letter Before Action Must Include
Whether you are claiming an unpaid debt, a faulty product refund or a landlord deposit dispute, your letter should cover all of the following:
Your full name and address, and the full name and address of the person or organisation you are writing to.
A clear statement that this is a letter before action and that you intend to begin court proceedings if the matter is not resolved.
A summary of the facts: what happened, when it happened, and why you believe the other party is liable.
The amount you are claiming or the specific remedy you are seeking, with a clear explanation of how you calculated the figure.
Copies of the key documents you are relying on, or a list of them with an offer to provide copies on request.
A reasonable deadline for response, typically 14 days for straightforward consumer disputes and 28 to 30 days for more complex claims or debt claims against individuals.
A clear statement of what will happen if they do not respond: that you will issue a claim in the county court without further notice.
Keep the tone firm and factual. A letter before action is not the place to vent frustration or make personal accusations. Courts look at these letters and a letter that reads as aggressive or unreasonable can work against you. State the facts, state the law if you know it, state what you want, and give a deadline.
Letter One: Letter Before Action for Unpaid Money or Faulty Goods
Use this letter for unpaid invoices, refunds not received, or faulty goods and services where the trader has refused to put things right.
[Your full name]
[Your address]
[Date]
[Full name of person or company]
[Their address]
Subject: Letter Before Action – [Brief description, e.g. Unpaid Invoice / Refund for Faulty Goods] – Amount Claimed: £[X]
Dear [name / Sir or Madam],
I am writing to formally notify you that I intend to issue a claim against you in the county court if this matter is not resolved within [14 / 28] days of the date of this letter.
The facts
[Set out the facts clearly and in chronological order. For example: On [date], I [purchased / commissioned / ordered] [describe the goods or service] from you for £[amount]. [The goods were delivered on [date] but were faulty in the following respects: describe the fault. / The service was completed on [date] but was not carried out to a satisfactory standard because: describe the problem. / I paid your invoice number [X] dated [date] but the goods / service were never delivered.] I contacted you on [date] by [email / letter / phone] and asked you to [refund me / repair the fault / deliver what I paid for]. You [did not respond / refused / agreed to resolve the matter but have failed to do so despite a further [X] weeks passing].]
My claim
I am claiming [the sum of £[X] / a full refund of £[X] / the cost of repair of £[X] as estimated by [name of trader], a copy of whose quote I enclose]. This sum is calculated as follows: [set out the calculation: purchase price £[X] / cost of replacement £[X] / repair costs £[X]].
[If relevant: Under the Consumer Rights Act 2015, I am entitled to a full refund where goods are faulty and I have rejected them within 30 days of purchase. / Under the Consumer Rights Act 2015, I am entitled to require the service to be re-performed or, if that is not possible, to a price reduction or refund.]
Documents enclosed
[List the documents: copy of invoice / receipt / order confirmation / email correspondence / photographs of the fault / repair quote / any other relevant documents].
What I am asking you to do
I am asking you to [pay me the sum of £[X] / issue a full refund of £[X]] within [14 / 28] days of the date of this letter. Payment should be made to [your bank account details, or: by cheque made payable to [your name]].
If I do not receive payment or a satisfactory response within [14 / 28] days, I will issue a claim in the county court without further notice. Court fees and any interest accrued will be added to the amount claimed. A county court judgment against you may affect your credit rating.
Yours sincerely,
[Your name]
[Contact details]
Letter Two: Letter Before Action for a Landlord Deposit Dispute
Use this letter when your landlord has withheld all or part of your deposit without adequate justification. Check first whether your deposit was protected in a government-approved scheme, as this affects the amount you can claim.
[Your full name]
[Your current address]
[Date]
[Landlord’s full name]
[Landlord’s address]
Subject: Letter Before Action – Unlawful Deduction from Tenancy Deposit – [Former address] – Amount Claimed: £[X]
Dear [name / Sir or Madam],
I am writing to formally notify you that I intend to issue a claim in the county court in relation to the unlawful deduction of £[X] from my tenancy deposit, unless this matter is resolved within 14 days of the date of this letter.
The facts
I was the [sole / joint] tenant at [former address] from [tenancy start date] to [tenancy end date]. My deposit of £[total amount] was paid on [date] and [was / was not] protected in the [name of scheme] deposit protection scheme. My tenancy ended on [date] and I vacated the property in [good / clean] condition, as evidenced by [the check-out inventory / photographs taken on [date] / the check-out report prepared by [agent name]].
On [date] you [returned only £[X] of my deposit / failed to return any of my deposit], deducting £[X] for [the reasons you gave, e.g. cleaning / damage / redecoration]. I dispute [all of / part of] this deduction for the following reasons: [set out why the deduction is not justified: the property was left in the same condition as at the start of the tenancy, as shown by the check-in and check-out inventories / the items you have claimed for were already damaged or worn at the start of my tenancy, as recorded in the check-in inventory / the deductions claimed significantly exceed the actual cost of the work carried out].
My claim
I am claiming the return of £[X], being [the full deposit / the disputed portion of the deposit]. [If the deposit was not protected: I am also claiming a penalty under section 214 of the Housing Act 2004 for failure to protect my deposit in an approved scheme. The court may award between one and three times the deposit amount as a penalty.]
Documents enclosed
[List: copy of tenancy agreement / check-in inventory / check-out inventory or report / photographs / deposit protection certificate or correspondence showing the scheme used / your correspondence about the deduction].
What I am asking you to do
I am asking you to return £[X] to me within 14 days of the date of this letter, by bank transfer to [your account details] or by cheque made payable to [your name].
If you do not do so, I will issue a claim in the county court without further notice. Court fees will be added to the amount claimed.
Yours sincerely,
[Your name]
[Contact details]
Letter Three: Letter Before Action for an Unpaid Personal Debt
Use this letter where an individual owes you money — for example, a loan between friends or family members, or an informal arrangement that has not been honoured. Note: if the debt is owed by an individual consumer (not a business), the Pre-Action Protocol for Debt Claims applies and you must follow the additional steps described above, including enclosing the standard information sheet, reply form and financial statement form.
[Your full name]
[Your address]
[Date]
[Full name of the person who owes you money]
[Their address]
Subject: Letter Before Action – Outstanding Debt of £[X]
Dear [name],
I am writing to formally request payment of the sum of £[X], which you owe me, and to notify you that I intend to issue a county court claim if this matter is not resolved within 30 days of the date of this letter.
The debt
[Set out clearly how the debt arose: On [date], I lent you the sum of £[X] [by bank transfer / in cash], which you agreed to repay by [date / in instalments of £[X] per month]. / On [date], I paid £[X] on your behalf for [describe what it was for], which you agreed to reimburse me. / I provided [services / goods] to you on [date] to the value of £[X], for which you have not paid.] A statement of account showing the amount owed and how it is calculated is enclosed.
I have asked you to repay this sum on [dates of previous requests] and you have [not responded / failed to make payment despite agreeing to do so]. The full amount of £[X] remains outstanding.
Documents enclosed
[List: statement of account / bank transfer records / any written agreement / text messages or emails confirming the debt / receipts].
[If the debt protocol applies, also list: information sheet / reply form / financial statement form.]
What I am asking you to do
I am asking you to repay the full sum of £[X] within 30 days of the date of this letter, by bank transfer to [your account details].
If you wish to propose a repayment arrangement, please contact me within 14 days to discuss. I am willing to consider a reasonable proposal before taking further action.
If I do not receive payment or hear from you within 30 days, I will issue a claim in the county court without further notice. A county court judgment against you is a matter of public record and may affect your ability to obtain credit, a mortgage or rented accommodation.
Yours sincerely,
[Your name]
[Contact details]
What Happens After You Send the Letter
If the other party responds
Read any response carefully. If they acknowledge the debt or fault but dispute the amount, consider whether their position has any merit. If they make a reasonable offer, consider accepting it — going to court for a marginally higher sum is rarely worth it once you factor in time and stress. If they raise a defence you had not considered, take advice before proceeding.
If they respond but the response is clearly inadequate — a blanket denial with no supporting argument, or an offer far below what you are owed — you can write back briefly, note that their response does not address your claim, and confirm you will be issuing proceedings.
If the other party does not respond
Once the deadline in your letter has passed without a response, you can issue a claim. For claims up to £10,000, this is usually done through the small claims track in the county court. You can start a money claim online at www.moneyclaim.gov.uk. Keep a copy of your letter before action and evidence of when it was sent, as you will need to confirm to the court that pre-action steps were followed.
If the other party pays
If payment arrives after you have sent the letter but before you issue a claim, keep a record of when it was received. If full payment is made, the matter is resolved. If only partial payment is made and you want to pursue the balance, write to confirm receipt of the partial payment and that you will be claiming the remainder.
Common Mistakes That Weaken a Letter Before Action
Setting an unrealistic deadline: Giving someone 24 or 48 hours to respond to a significant claim is unlikely to be considered reasonable by a court. 14 days is the minimum for most consumer disputes; 28 to 30 days for more complex claims.
Not enclosing key documents: A letter that refers to an invoice, contract or estimate but does not enclose it puts the other party at a disadvantage and makes your letter look weaker. Enclose copies of everything you are relying on.
Emotional or threatening language: Threatening to ‘ruin’ someone, contact their employer or go to the press can undermine your legal position and in some cases crosses into harassment. Stick to the legal remedy you are seeking.
Not specifying the exact amount: A letter that says ‘significant damages’ or ‘substantial losses’ without a figure is harder for the other party to respond to and harder for a court to evaluate. State the precise sum.
Not sending it in a way you can evidence: If the other party later claims they never received your letter, you need to be able to prove you sent it. Use email with a read receipt, first class post with a certificate of posting, or recorded delivery.
Sending it too soon: A letter before action carries more weight when you have already made reasonable informal attempts to resolve the matter. Sending it as a first step, before any attempt at direct resolution, may lead the court to conclude you did not act in the spirit of the pre-action protocols.
Getting Help
Free guidance on small claims and pre-action steps is available from Citizens Advice and the government’s Money Claim Online service. If your claim is more complex, or if the other party has legal representation, getting advice before you issue is worth considering. If you need help drafting a letter before action that is legally sound, precisely worded and gives you the strongest possible position before court, the team at LetterLab can help you get it right.
Letter Before Action Checklist
Have you made reasonable attempts to resolve the matter informally before sending this letter?
Does the letter clearly state it is a letter before action and that court proceedings will follow if unresolved?
Have you set out the facts chronologically and factually, without emotional language?
Have you stated the exact amount claimed and explained how you calculated it?
Have you enclosed copies of all key documents you are relying on?
Have you given a reasonable deadline: 14 days for straightforward disputes, 28 to 30 days for debt claims against individuals?
For personal debt claims, have you included the required information sheet, reply form and financial statement form under the Pre-Action Protocol for Debt Claims?
Have you sent the letter in a way you can evidence: email with read receipt, or post with certificate of posting?
Have you kept a copy and noted the date sent?
The Key Takeaway: A Letter Before Action Is a Legal Step, Not Just a Warning
Many people think of a letter before action as simply ‘one last try’ before going to court. It is more than that. Under the Civil Procedure Rules, it is part of a formal pre-action process that courts take seriously. A well-drafted letter shows the court you acted reasonably, made your position clear, and gave the other party a proper opportunity to resolve the matter. A poorly drafted letter, or no letter at all, can cost you even when your claim is sound.
Most letters before action are never followed by a court claim, because most people and organisations do not want the expense and publicity of county court proceedings. A clear, specific, properly timed letter before action resolves the majority of disputes before they reach that stage.
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