How do I write an effective complaint letter?

Include a clear description of the problem with dates, the impact on you, the resolution you're seeking, and a reasonable deadline. Keep the tone firm but professional.

Who should I address a complaint letter to?

Address it to the highest-level person you can identify — a department manager, customer service director, or CEO. Generic addresses are less effective.

How long should I wait for a response to a complaint?

Give the company 14 business days. State this deadline in your letter. If no response, follow up and consider escalating to consumer protection agencies.

Professional

Formal Complaint Generator

Address issues formally and get results. Powered by AI — get a professional, ready-to-send letter in under 30 seconds.

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Part of Refund & Complaint Letters

Sample Formal Complaint

A complete example you can adapt. Replace the [bracketed] details with your own — or generate a personalized version in 30 seconds.

Customer Service Manager [Company Name] [Company Address] Dear Sir or Madam, Re: Faulty [Product Name], Order #[Order Number] I am writing to formally complain about [product/service] purchased on [purchase date] from [store/website]. The item was advertised as [description/promised condition] but has failed to perform as expected. Since [date the issue began], the product has [describe the specific fault, e.g. stopped charging after two days]. I contacted your support team on [date] and spoke with [name/reference number], but the issue remains unresolved. As a result, I have been unable to [explain the impact this has had on you]. I have attached copies of my receipt and previous correspondence as supporting evidence. To resolve this matter, I request a [full refund / replacement / repair] within 14 days of the date of this letter. Please confirm in writing how you intend to proceed. I look forward to your prompt reply. Yours faithfully, [Your Name] [Contact Details]

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When to use this letter

Use this when a product or service has fallen short of what was promised and informal contact hasn't fixed it. It creates a clear, dated written record of your complaint and the resolution you're asking for.

What to include

What you bought, when, and where, plus any order or reference number
A factual description of the problem and the exact date it started
Any earlier contact you've had, including dates, names, and case numbers
The specific resolution you want (refund, replacement, or repair) and a clear response deadline

Common mistakes to avoid

Venting emotionally or using insulting language instead of stating the facts
Being vague about what went wrong or what outcome you actually want
Leaving out dates, receipts, and other evidence that backs up your account

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Your Name

Recipient Name(optional)

Company/Organization

Subject of Complaint

Details of the Issue

0 characters

Desired Resolution

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Output Language

Select tone

Fill in your Formal Complaint details on the left

Your polished letter will appear here in about 30 seconds

Example output

[Date]

Dear [Recipient's Name],

I am writing to you regarding [your specific situation].

[The AI personalises this section using the details you fill in on the left — every letter is unique to your situation.]

[Additional context and supporting details get woven naturally throughout.]

Thank you for your time and consideration.

Sincerely,
[Your Name]

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What you'll need

Fill in these details and our AI will craft your formal complaint instantly:

Your Name
Company/Organization
Subject of Complaint
Details of the Issue
Desired Resolution

How it works

1Fill in the details about your formal complaint
2Choose your preferred tone: Firm, Polite, Urgent
3Click generate and get your professional letter in seconds
4Copy, download as PDF, or regenerate as needed

Need a template, example, or format first?

Complaint letter searches need both a firm draft and a format that keeps the request factual and credible.

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Generate a complaint letter

Draft a clear complaint with the issue, evidence, and requested resolution.

template

Formal complaint letter template

Use a structured template for workplace, service, or organization complaints.

example

Formal complaint letter example

Review an example that stays firm without sounding hostile.

format

Complaint letter format

Organize the complaint by issue, facts, impact, and requested action.

Frequently asked: Formal Complaint

Related Letter Types

Refund Request

Request a refund for a product or service

Billing Dispute

Dispute incorrect charges on your account

Service Cancellation

Cancel a service or subscription formally

Sample Formal Complaint

A complete example you can adapt. Replace the [bracketed] details with your own — or generate a personalized version in 30 seconds.

When to use this letter

What to include

What you bought, when, and where, plus any order or reference number
A factual description of the problem and the exact date it started
Any earlier contact you've had, including dates, names, and case numbers
The specific resolution you want (refund, replacement, or repair) and a clear response deadline

Common mistakes to avoid

Venting emotionally or using insulting language instead of stating the facts
Being vague about what went wrong or what outcome you actually want
Leaving out dates, receipts, and other evidence that backs up your account

[Date] Dear [Recipient's Name], I am writing to you regarding [your specific situation]. [The AI personalises this section using the details you fill in on the left — every letter is unique to your situation.] [Additional context and supporting details get woven naturally throughout.] Thank you for your time and consideration. Sincerely, [Your Name]