What is an IELTS formal complaint letter?
IELTS formal complaint letter: Task 1 written response to an unknown professional or organisation — company, shop, hotel, service provider — about a problem or situation and stating what they want the other – professional – person to do. The register is always formal, there are no contractions, all formal words used throughout and the general structure is a clear four paragraphs.
Complaint letter is the type of letter that is mostly tested on IELTS General Training. Simply doing a letter of this one type is enough to raise your Task 1 band score significantly.
Key points: Open by stating what the letter is regarding and describing the situation in two sentences, describe the problem clearly in second paragraph, explain how it has affected you in 3rd paragraph, mention what you expect from them as a resolution in 4th paragraph. Keep the tone firm, but not angry or emotional.
Identifying a formal complaint letter in the exam
The task question always provides enough information for you to identify the type of letter. Below is an example of what a formal complaint letter says:
Get in touch with the manager of the hotel/shop/company…
Letter to customer service department…
“Write to the airline/landlord/organisation…”
“Write a complaint letter to …
Someone with whom you have no professional relationship is always your recipient. This was to say: no contractions, no informal speech, no personal passionate address and a precise signature as Yours faithfully (if you did not mention the recipient by name) or Your sincerely (if you addressed the recipient in full).
The correct structure
Salutation – “Dear Sir or Madam” or “Dear Mr/Ms [surname]”
1st paragraph (25–35 words): Who you are and why you are writing (a short sentence). DO NOT START COMPLAINT DETAIL HERE.
Introduction: I would like to complain about the [product/service] that I have received at your [store/hotel/company] on [date].
Narrow down precisely what the problem is, Bullet point 1 paragraph (40–50 words) Be specific — the date, a name for the product, the exact problem. Be careful not to use vague terms like — there was a problem — instead, specify exactly what the issue was!
Bullet point 2 paragraph: Explain the impact (40–50 words) How this situation have affected you? Loss of money, time taken away from other things in your life, some level of emotional duress — keep it vague but proportional
Bullet point 3 paragraph (40–50 words): State a particular action you want. Do not make vague requests for help aka “something done”, ask for a refund, replacement, repair, letter of apology or some action taken by some date.
Final line + sign-off: “I trust this matter will receive your expeditious attention and await, >>for company name<< response.” + “Yours faithfully/sincerely,”
Tone: firm but professional
The number one tone mistake with IELTS complaint letters is being too emotional. Examiners actively seek professional decorum, or the disciplined use of formal language to convey genuine discontent.
Convert emotional language into professional equivalents:
FURIOUS → Find it deeply unsatisfactory
“The staff were all idiots” → “The service I had received was poor”
‘This is a sham’ → ‘This is way below the level I would expect from The Guardian’})
From: “You better fix this one way or another” To: “I would ask you to correct this within 14 days”
Angry: “I am furious, fuming and very upset” → Dissatisfied with: “This has caused me a lot of inconvenience and stress.”
The test: Would you say this in a job interview? Otherwise, it is too informal or too passionate for a formal complaint letter.
Band 6 vs band 7 complaint letter
Band 6 example:
“Dear Sir or Madam,
With reference to the laptop that I purchased from your shop. It stopped working after three days which is very bad. I am very unhappy with this.
Say what you do with an expensive laptop and now it does not work. This is not acceptable. I was forced instead to use my very slow old system.
Either a new laptop or my money back. I hope that you will solve this issue promptly.
Yours faithfully,”
Band 7 example:
Dear Sir or Madam,
This is to build up the complaint regarding a laptop purchased from your online store on 14th March (Order No. We purchased an entire device which was brand new, in trial it broke three days into use and the device was rendered completely non-functional
It has impacted my work extensively this is because I need a laptop for my day to day work. So until the matter is resolved I have been left with no choice, incurring further costs hiring alternative equipment.
I thus request a refund in full or an immediate replacement unit. If this is not organized within seven days of receiving this letter, I will have no choice but to refer the issue to the appropriate consumer protection agency.
I hope to hear back from you soon.
Yours faithfully,”
What makes the band 7 version better:
The band 7 response uses specific details (order number, date, product), precise vocabulary (“non-functional,” “incur additional costs,” “relevant consumer protection authority”), varied sentence structures including a conditional clause, and a proportionate but firm closing that signals confidence without aggression.
10 ready-to-use formal complaint phrases
Opening the complaint:
- “I am writing to formally express my dissatisfaction with…”
- “I wish to bring to your attention a matter that has caused me considerable inconvenience…”
Describing the problem:
- “I was extremely disappointed to discover that…”
- “To my great frustration, the [product/service] proved to be entirely unsatisfactory in that…”
Stating the impact:
- “This has resulted in significant disruption to…”
- “As a direct consequence, I have incurred [financial loss / inconvenience / distress]…”
Requesting resolution:
- “I would therefore request a full refund at your earliest convenience.”
- “I expect this matter to be rectified within [timeframe].”
Closing:
- “I trust this matter will receive your urgent attention and look forward to your prompt response.”
- “Should this not be resolved satisfactorily, I will have no alternative but to pursue the matter further.”
Most common mistakes in IELTS complaint letters
Emotional language — Exclamations (“This is outrageous!”) One instance of relaying on raw emotional outbursts negatively impacts your formal register score right away.
Vague requests— “I hope something will happen” is far worse than “I would like a full refund by the 30th April.” Be specific on what you are asking for.
Missing the impact paragraph — they focus on explaining the problem but forget to explain how it affected them. The effect falls typically under the second bullet point (one final full paragraph for this).
Weak opening — Use of the sentence “I am writing this letter to complain about a problem” is a missed opportunity. Use a formal register with a professional, specific opener.
Your complaint letter writing checklist
Before submitting your letter, confirm:
- ✅ Salutation is formal — “Dear Sir or Madam,” or “Dear Mr/Ms [Surname],”
- ✅ Opening paragraph states the reason for writing without launching into detail
- ✅ Problem described with specific details (date, product name, reference number)
- ✅ Impact explained clearly in its own paragraph
- ✅ Specific resolution requested — refund, replacement, repair, or apology
- ✅ No contractions anywhere in the letter
- ✅ No emotional language — assertive and professional throughout
- ✅ Closing line is forward-looking
- ✅ Sign-off matches the salutation
- ✅ Word count is 160–185 words
What tone should I use in an IELTS formal complaint letter?
Be assertive but professional — never aggressive, or emotional. Use dry, formal statements of discontent: “I find this development extremely unimpressive,” versus “I’m really mad!” The best complaint letters remain calm, concrete and professional from top to bottom
Should I use “Yours faithfully” or “Yours sincerely” in a complaint letter?
If you began your complaint letters with “Dear Sir or Madam,” as one does to an unknown addressee, then close it off with “Yours faithfully.” Yours sincerely — comes only if the other person addressed by name, (eg Dear Mr Collins). Mixing these is a common register mistake which also impacts task achievement.
How specific should I be in an IELTS complaint letter?
As specific as possible. Write the date of your purchase or when you visited, name/type of product or order number, what fault it had and how it directly affected you and write clearly in a single sentence as to how you would like them to resolve this for example a refund or replacement part/leave by x-date. Tim General complaints like “there was a problem” are given by far lower marks than detailed descriptions of what went wrong.
What are the three bullet points typically used in an IELTS complaint letter?
An IELTS letter complaint bullet point usually asks you to: (1) explain the problem (2) describe how this has impacted on you and (3) tell me what you want the company or person to do. Your three body paragraphs correspond one-to-one with these three points. Each must be developed in detail — not merely mentioned one line.
Can I use emotional language in a formal IELTS complaint letter?
No. Emotional language e.g. “I am furious”, “This is disgraceful”, “I am devastated” is not a formal transition and flag to the examiner that you have failed to register, it will simply exclude your band score from being this high. Translate emotional responses into professional ones: “At this point I’m completely dissatisfied,” “This doesn’t meet the standards I would like to see” or “I am entirely unsatisfied with this outcome.”
How do I end a formal IELTS complaint letter?
Close out with a sentence that looks ahead and signals you are anticipating a response, and then sign your name. Your closing can be: “I believe this matter is capable of being resolved quickly and I look forward to hearing from you” or “Failure to resolve the issues within 14 days will leave me with no option other than to escalate the matter.” Wrap up with “Yours from the core of my heart,” or if appropriate, “Yours sincerely.”