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How to Write a Complaint Letter (Canada)

A complaint letter is a formal written document sent to a company, landlord, or service provider requesting resolution of a specific problem. It creates a paper trail and sets a deadline for response.

To write an effective complaint letter, you need to cover these 5 essential elements:

  1. Your contact details and account information
  2. A clear description of the problem with dates and amounts
  3. What you have already tried to resolve it
  4. The specific resolution you are requesting
  5. A firm deadline for response (10–14 business days)

Below you will find a complete step-by-step guide, a copy/paste template, and three example letters for the most common situations in Canada.

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Step-by-Step: Writing Your Complaint Letter

Follow these steps to write a complaint letter that gets results:

Before you write, collect your account number, dates of the issue, amounts involved, names of anyone you spoke to, and copies of receipts, bills, or emails. Having everything in front of you makes the letter faster to write and harder for the company to dismiss.

Describe what happened in factual, specific terms. Avoid emotional language. Include the date, amount, and what went wrong. A clear, factual account is more effective than a frustrated one.

Note any previous phone calls, emails, or chat conversations. Include dates and the name of the representative if possible. This shows the company (and any regulator) that you made a good-faith effort to resolve it first.

Be specific about what you want: a refund, credit, repair, contract cancellation, or other remedy. Vague requests get vague responses. State the exact dollar amount or action you expect.

Give the company 10–14 business days to respond. Mention that if unresolved, you may escalate to the relevant regulator (CCTS for telecom, OBSI for banking, provincial consumer protection office, etc.). This creates urgency without being aggressive.

Complaint Letter Template (Copy/Paste)

[Your Name]
[Your Address]
[City, Province, Postal Code]
[Your Email]
[Date]

[Company Name]
[Company Address or Complaints Department]

Subject: Formal Complaint – [Account/Order Number]

Dear Sir or Madam,

I am writing to formally complain about [describe issue: incorrect charge, service not provided, billing error, etc.] related to my account/order [number] dated [date].

Summary of facts:
- On [date], I [purchased/subscribed to/received] [describe service or product]
- I was charged $[amount] on [date]
- [Describe what went wrong: service not delivered, charge incorrect, product defective, etc.]
- I contacted [company] on [date(s)] but the issue remains unresolved

Requested resolution:
I am requesting [refund of $X / credit to my account / correction of billing error / other specific remedy].

Please respond in writing within 14 business days of this letter. If I do not receive a satisfactory response, I intend to escalate this matter to [relevant regulator or consumer protection body].

Attachments: [List any receipts, statements, photos, or correspondence enclosed]

Sincerely,
[Your Name]
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When Should You Write a Complaint Letter?

Write a formal complaint letter when:

  • Customer service is not solving your issue
  • You were billed incorrectly or unfairly
  • A company is refusing a refund or credit
  • A landlord is ignoring repair obligations
  • You were charged fees you did not authorize
  • A product or service was not delivered as promised

In many sectors — especially telecom and banking — regulators expect you to first attempt resolving your issue directly with the business in writing.

Complaint Letter Examples

Below are three example complaint letters for common Canadian situations. Copy and adapt these, or generate a personalized version using the tool.

1. Telecom / Internet Billing Dispute 

Subject: Incorrect Billing - Request for Review and Credit

Hello,

I am writing to dispute charges on my account for the period of [dates]. On [date], I was billed an additional amount of $[amount] for [describe the issue: overage, service not provided, cancellation fee, etc.].

I contacted customer service on [date] but the issue remains unresolved.

I am requesting:
1. A full review of the charges; and
2. A credit for the incorrect amount.

Please confirm in writing within 10 days. I can provide supporting documents if needed.

Thank you,
[Your Name]

2. Bank / Credit Card Fee Dispute 

Subject: Dispute of Unauthorized or Incorrect Bank Fee

Hello,

I am writing to dispute a fee of $[amount] applied to my account on [date]. I did not authorize this charge, and based on my conversation with your representative on [date], the fee appears to be an error.

I request that the fee be reversed and that my account reflect the correct balance. Please confirm in writing once the correction is made.

Sincerely,
[Your Name]

3. Landlord / Repair Issue 

Subject: Request for Required Repairs

Hello,

I am writing regarding ongoing repair issues at [your address]. The problem (describe issue: heat not working, plumbing leak, etc.) has been present since [date] and has not been resolved despite previous notifications.

Under provincial residential tenancy laws, landlords are required to maintain the unit in a good state of repair.

I am requesting that repairs be completed within 7 days. If this matter cannot be resolved promptly, I may need to pursue next steps with the residential tenancy authority.

Thank you,
[Your Name]

Tips for Getting Faster Responses

  • Keep your letter factual and concise—avoid emotional language
  • Attach screenshots, statements, or photos where relevant
  • Send the letter to the company's official complaints or escalation channel
  • Use email or an online complaints form to create proof of submission
  • Give a firm but reasonable deadline (10–14 days)

Frequently Asked Questions

A dispute letter is a formal written complaint to a company, landlord, or service provider requesting resolution of a specific problem such as incorrect billing, undelivered goods, or breach of contract.

State your name and contact details, describe the issue with dates and amounts, explain what resolution you want, set a response deadline (typically 10-14 days), and keep a copy for your records.

Include your contact information, account or order number, dates of the issue and previous contact attempts, a clear description of the problem, the remedy you are requesting, and a deadline for response.

Send a dispute letter when verbal requests or customer service calls have not resolved the issue, when you need documentation for escalation, or when a company is not honoring its obligations.

Yes. A dispute letter is effective for billing errors from telecom providers, banks, utilities, and other service companies. Document the incorrect charge, the correct amount, and request a credit or refund.

A dispute letter is not a legal document but creates important written evidence of your complaint. Many regulators and tribunals in Canada require proof that you attempted to resolve the issue directly before escalating.

10 to 14 business days is standard for most consumer disputes in Canada. Some industries have specific timelines set by regulators.

If ignored, send a second letter referencing your first request. If still unresolved, escalate to the relevant regulator (CCTS for telecom, OBSI for banking) or consider small claims court.

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