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Complaint Letter for a Defective Product

Complaint Letter for a Defective Product. Fill it in online, choose the tone, witness block and layout, and download a print-ready PDF.

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Complaint Letter for a Defective Product - sample

Maria Garcia
45 Park Road, Manchester M1 4AB
+91 98765 43210

Manchester
Date: 06/10/2026

To
The Branch Manager
City Bank, High Street, Manchester

Subject: Complaint Letter for a Defective Product

Dear Sir or Madam,

I am writing to complain about a product I bought from you (REF-2026-014) on 06/10/2026 for 10,000. The problem is: the product delivered on 3 May stopped working after two days, although it was used as the instructions say.

I request you to replace the product or refund the full amount. Please reply within 14 days. I have kept the bill and the product, and I may approach the consumer forum or the relevant authority if the matter is not resolved.

Yours faithfully,


Maria Garcia

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Complaint Letter for a Defective Product

A complaint letter tells a company, landlord or authority what went wrong and what you want done. Clear facts, dates and a specific request get faster answers than a long, angry letter.

When to use it

  • Faulty product or poor service
  • Billing errors with banks, utilities or insurers
  • Landlord, neighbour or workplace problems
  • Delayed delivery, flight or hotel issues

How to write Complaint Letter for a Defective Product

  1. Write the order, account or reference number so the complaint can be traced.
  2. Describe what happened in a few clear sentences, with dates.
  3. Say exactly what you want - a refund, a replacement, a repair, an apology - and by when.
  4. Attach copies (never originals) of bills and messages, keep a copy of the letter, and send it in a way that gives you proof.

Attach with it

  • Copies of bills, receipts, tickets and messages
  • Photographs of the defect

Common mistakes

  • Writing a long angry letter without dates
  • Not saying what you want
  • Sending originals instead of copies

Options you can choose

Tone and salutation, validity statement, ID-copies note, witness boxes, execution note (notary / stamp paper / oath), QR or reference box, four layouts and - in any language except English - a side-by-side English copy.

How to write a Complaint Letter for a Defective Product

  1. Fill in the form: Your full name, Your address, Phone / email, Addressed to (name, office, address), Company / organisation, Reference number.
  2. Add your letterhead, logo, footer or watermark if you like.
  3. Download a print-ready PDF - or send it for e-signature.

Complaint letters →

FAQ

How do I make a complaint letter effective?

State the order or account number, describe what happened with dates, say what you want and by when, and attach copies of the evidence. Keep the tone firm and polite.

How long should I wait for a reply?

Give a deadline of 7 to 15 days. If the company does not reply, escalate to the regulator, ombudsman, consumer forum or court as your country allows.

Should I send it by post or e-mail?

Both if possible. Registered post or a tracked e-mail gives you proof of delivery.

Is this Complaint Letter for a Defective Product template free?

Yes. You can fill it in online and download it as a PDF for free, without installing anything.

Can I change the wording?

Yes. Every sentence of the document can be edited on the page before you download it.

Is this template available in other languages?

Yes - the same document is available in 26 languages. Use the language links on this page.

This is a general template, not legal advice. Check any requirements that apply in your country or organisation.

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