Need to write a complaints letter? Our free template and 2026 UK guide helps you structure your complaint for maximum impact.
Free Complaints Letter Template That Gets Results (2026 UK Guide)
Not sure how to write a complaints letter? You're not alone. Most people don't know where to start.
This guide gives you a free template. It also explains what to include and why it works.
Why Written Complaints Work Better
Phone calls are easy to ignore. Emails get lost. But a formal letter? That's harder to dismiss.
A written complaint:
- Creates a legal paper trail
- Shows you're serious
- Gives the company a deadline
- Protects your rights if you escalate
Always put your complaint in writing. Even if you've already called.
The Free Complaints Letter Template
Copy and adapt this template for your situation.
[Your Name] [Your Address] [Your Email] [Date]
[Company Name] [Company Address]
Subject: Formal Complaint — [Brief Description] — [Account/Order Number]
Dear [Name or "Sir/Madam"],
I am writing to make a formal complaint about [describe the issue briefly].
What happened: On [date], [describe what went wrong — be specific and factual].
How this affected me: [Explain the impact — financial loss, inconvenience, distress, etc.]
What I am requesting: I am asking you to [state your desired outcome — refund, repair, replacement, apology].
Under the Consumer Rights Act 2015, I am entitled to [state your legal right — e.g., a full refund for goods not fit for purpose].
Please respond within 14 days of receiving this letter.
If I do not hear from you, I will escalate this matter to [relevant ombudsman or Trading Standards].
Yours sincerely, [Your Name]
Tips for a Strong Letter
Be specific. Dates, amounts, and names make your complaint credible.
Be brief. One page is enough. Two pages is too many.
Be firm. State what you want. Don't hint at it.
Cite the law. It shows you know your rights. Companies respond faster when you do.
Which Law Applies to You?
| Situation | Relevant Law |
|---|---|
| Faulty product | Consumer Rights Act 2015 |
| Poor service | Consumer Rights Act 2015 |
| Energy bill dispute | Energy Act 2013 |
| Financial mis-selling | Financial Services Act 2012 |
| Landlord dispute | Housing Act 2004 |
| NHS complaint | NHS Constitution |
What to Do If They Don't Respond
Give them 14 days. If they don't respond, escalate.
Options include:
- Citizens Advice — free, impartial advice
- Trading Standards — for fraud or unsafe products
- Financial Ombudsman — for banking and insurance
- Energy Ombudsman — for energy suppliers
- Small Claims Court — for amounts up to £10,000
Most companies settle before it gets to court.
Let AI Write It for You
The template above is a good start. But every complaint is different.
LetterForce tailors your letter to your exact situation. It cites the right law. It uses the right tone. And it takes minutes.
Your first letter is completely free.
Summary
A good complaints letter is short, factual, and firm. It cites the law. It gives a deadline. And it asks for something specific.
Use the template above. Or let LetterForce do it for you.
Either way — don't stay silent. You have rights. Use them.
Ready to Write Your Letter?
LetterForce generates professional, legally-sound complaint letters in minutes — backed by UK consumer law.