Complaint Letter Generator
Write a professional, formal complaint letter that companies take seriously. Personalised to your situation. Free preview included.
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A well-structured complaint letter is often the fastest route to a resolution. Companies take written complaints more seriously than phone calls — and it creates a paper trail if you need to escalate.
When to use this letter
- A product or service has not met a reasonable standard and informal contact has not produced a resolution.
- You have been treated unfairly, given incorrect information, or had a reasonable request dismissed.
- You want to create a formal written record before escalating to an ombudsman or your card provider.
- You have already tried to resolve the matter verbally or informally and the situation has not improved.
- You want to put the company on notice with a clear deadline for a response.
What a complaint letter looks like
A short sample — your letter will be personalised to your specific details and situation.
[Your Name] [Your Address] [Date] Customer Relations Manager [Company Name] [Company Address] Re: Formal Complaint — [Subject of Complaint] Dear Sir or Madam, I am writing to formally record my complaint regarding [issue] experienced on [date]. I am a customer of [Company Name] and have been dissatisfied with the level of service provided. On [date], [describe what happened clearly and factually]. This has caused me [inconvenience/financial loss/distress] because [brief explanation]. I contacted your [customer service team/store] on [date] and was told [what you were told]. This response was unsatisfactory because [reason]. Under the Consumer Rights Act 2015, I am entitled to [remedy]. I am therefore formally requesting that [Company Name] [state what you want — refund, apology, correction]...
Sample only. Your letter is written from the specific facts, dates, and names you provide.
How it works
Add your details
Tell us who it's from, who it's to, and the key facts of your situation. Rough notes are fine.
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What makes this letter effective
The more detail you provide, the stronger your letter will be.
Stick to the facts
Dates, reference numbers, what was said, and what went wrong. Emotional language weakens your case.
State your remedy
Be specific about what you want — a refund, a replacement, a written apology, or a correction.
Keep a copy
Always keep a copy of the letter and any responses. You may need them if you escalate.
Set a deadline
14 days is standard. It shows you're organised and prepared to take further action.
Common mistakes to avoid
These are the errors that most often weaken an otherwise strong letter.
Writing in an angry or aggressive tone
A calm, factual letter is more effective and harder for a company to dismiss. Emotional language shifts the focus away from the substance of the complaint.
Not stating what resolution you are seeking
Be specific about whether you want a refund, a replacement, an apology, or an explanation. Without a clear ask, the company's response may be vague or insufficient.
Leaving out key details
Dates, order references, the names of staff you spoke to, and what you were told — these details make the complaint specific and harder to deflect.
Not setting a response deadline
14 days is standard for formal complaints. A deadline shows you are organised and prepared to take the matter further if necessary.
Frequently asked questions
A strong complaint letter should include: your contact details, the date, a clear subject line, a factual account of what happened, what you've already tried, a specific request (refund, apology, correction), and a deadline for response.
More formal than a casual email, but not aggressive. You want to sound serious and organised — not angry. Formal language signals that you know your rights and are prepared to escalate.
After 14 days with no response, send the follow-up letter. You can then escalate to the relevant ombudsman, trading standards, or your card provider for a chargeback if appropriate.
Email with a read receipt is usually sufficient. For serious disputes, send it by recorded post as well, which provides legal evidence of delivery.
Other options if you are not ready to generate instantly
Some people prefer to check wording, tone, or get human help before sending an important letter. These options can help without replacing the instant generator.
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