This reusable UK complaint letter template library helps you turn a frustrating dispute into a clear written record, whether you are seeking a refund, reporting poor service, chasing a repair or preparing to escalate an unresolved complaint.
Overview
A good complaint letter does more than express dissatisfaction. It explains what happened, identifies the outcome you want and gives the recipient enough information to investigate the problem. It also creates a dated record of your position, which can be useful if you later use an internal complaints process, an ombudsman scheme, a card-provider process or a civil claim.
The templates below are designed for consumer disputes in England, Wales, Scotland and Northern Ireland. The legal remedy available to you can depend on the contract, the goods or service, the trader’s terms, where you live and the facts of the dispute. Treat the wording as a practical starting point rather than a substitute for tailored legal advice.
Keep your first letter proportionate. State the facts, refer to the relevant agreement or order, explain the problem and ask for a specific remedy. Avoid long arguments, personal criticism and claims you cannot support. A concise complaint is usually easier for a business to process and easier for you to rely on later.
For the wider process, see our guide to how to complain in the UK and escalate a dispute. If the issue concerns goods or services supplied by a trader, our Consumer Rights Act guide provides useful background.
Template structure
Use the following structure for a formal complaint letter or email. Remove any section that does not apply, and attach only the evidence needed to explain the issue.
Subject: Formal complaint about [product, service or transaction] – [reference number]
Dear [name or complaints team],
I am writing about [brief description of the purchase, booking, contract or service]. The relevant reference is [order, account, invoice or booking number]. I paid [amount, if relevant] on [date] by [payment method].
The problem is as follows: [set out what happened in date order]. In particular, [describe the defect, delay, cancellation, missing service or poor standard]. I contacted [person or department] on [dates] and the response was [brief summary].
This has caused [practical loss, inconvenience or other consequence]. My requested resolution is [refund, repair, replacement, cancellation, correction, payment of a stated loss or a written explanation].
Please treat this as a formal complaint and confirm how it will be investigated. Please respond in writing by [reasonable date or stated complaints deadline]. If you do not resolve the matter, I will consider the next available escalation route, which may include your final complaints procedure, an appropriate ombudsman or regulator, a payment-provider dispute process or a civil claim.
I have attached [list of documents]. Please acknowledge receipt and let me know if you require any further information.
Yours faithfully,
[full name]
[address or account details, if needed]
[telephone and email]
Do not describe the letter as a “letter before action” unless you genuinely intend to consider court proceedings and have checked the relevant pre-action requirements. A letter before action is more than a stronger complaint: it should identify the legal basis of the proposed claim, the remedy sought and the consequences of failing to respond. Use a suitable formal complaint letter structure first where the matter is still at the ordinary complaints stage.
How to customize
Refund for a cancelled order or service not provided
Identify exactly what you paid for and what was not supplied. If only part of a package was affected, separate the affected part from the part you received. Ask for the amount you believe is due and explain how you calculated it. If you are relying on a cancellation right, a contract term or consumer legislation, name it only when you are confident it applies.
Suggested wording: “The agreed service was not provided on [date], despite payment of [amount]. I am requesting [a full refund or refund of the unprovided part] and an explanation of when this will be processed.”
Faulty or misdescribed goods
Describe the fault without exaggeration. Include when you first noticed it, how the product was used and whether you have already accepted a repair, replacement or other remedy. Attach photographs, a technical report or correspondence where relevant. Avoid attempting a repair that could make the condition harder to assess unless the trader has agreed to it.
Suggested wording: “The item appears not to match its description or the standard reasonably expected because [specific fault]. The fault was identified on [date]. I am asking you to provide [repair, replacement, price reduction or refund], subject to my statutory and contractual rights.”
Delayed or inadequate repair
List each repair request, appointment and missed commitment. State whether the problem is recurring and whether the repair has caused additional damage or prevented normal use. Ask for a practical timetable, the name of the responsible contact and confirmation of any temporary arrangement.
For a property repair, include the address, room affected, date first reported and any health, safety or access concern. Tenants may also need to use the landlord’s formal procedure or complain to a relevant housing body. See our council housing complaint guide for a separate route where social housing is involved.
Poor service or unresolved complaint
Quote the service standard, appointment promise or important term if you have it. Explain the gap between what was promised and what happened. If the business has already issued a final response, say so and identify the points you believe remain unresolved. This can help you establish whether an ombudsman or other external route is available.
Examples and evidence checklist
A complaint about a broadband installation might say: “The installation scheduled for 12 March did not take place. I was not given reasonable notice of cancellation and have incurred [specific evidenced loss]. I ask you to confirm a new appointment, explain the missed visit and consider the compensation or refund available under the agreement.” This is more useful than simply saying that the company’s service was unacceptable.
Before sending, gather:
- the order confirmation, contract, invoice or receipt;
- dates and summaries of calls, visits and previous complaints;
- photographs, videos, inspection reports or delivery records;
- proof of payment and a clear calculation of any amount requested;
- relevant terms, promises, adverts or messages; and
- evidence of consequential loss, where you are claiming it and it is reasonably connected to the problem.
Send the complaint through the method specified in the trader’s procedure. Keep a copy of the exact text, attachments and sending date. If you post it, consider a delivery method that provides evidence of delivery. If you email, save the sent message and any automatic acknowledgement.
Payment disputes may have separate routes. Depending on the circumstances, a card-provider claim, chargeback request or other payment complaint may be relevant, but these are not interchangeable and do not remove the importance of complaining to the trader. If an external scheme is available, check its eligibility rules and time limits before waiting indefinitely for a response.
When to update
Revisit this template whenever the facts change. Add a new paragraph after a repair visit, missed deadline, partial refund, final response or important phone call. Keep the original complaint intact and label later messages as follow-ups so the timeline remains clear.
Update the legal wording before sending an escalation if the dispute has moved from negotiation to a formal claim. Check the trader’s current complaints procedure, any applicable ombudsman requirements and the relevant limitation or pre-action rules. Do not assume that sending a complaint stops a legal time limit. If the amount is significant, the facts are disputed or court action is being considered, obtain advice on the applicable law and deadline.
Practical next steps: copy the template into a document, replace every bracketed section, remove irrelevant wording, attach a numbered evidence list and request one clearly defined outcome. Set a reminder for the response date. If the reply is incomplete, send a short follow-up quoting the unresolved points and ask for the organisation’s final response or the next stage of its procedure. Only then decide whether an ombudsman, regulator, payment-provider process or letter before action is appropriate.
