How to Write a Letter of Complaint

A letter of complaint should state what happened, provide the facts and clearly request a specific resolution. An effective complaint letter is calm, concise and supported by copies of relevant records.

When to Write a Letter of Complaint

Write a formal letter of complaint when a product, service, transaction or previous support contact has not resolved a problem. A written complaint creates a clear record of what you reported and what you asked the organization to do.

Before writing, gather the information needed to explain the issue accurately:

• Your name and the contact method you want the organization to use.
• The recipient’s name, department or official complaint office, if known.
• Relevant dates, locations and the names of people you contacted.
• Your account, order, case or reference number, if one applies.
• Receipts, statements, messages, photographs or other supporting records.
• Notes about earlier attempts to resolve the problem.
• The specific action that would resolve the complaint for you.

Do not include sensitive information unless the official complaint process requires it. Never send an original document when a readable copy will serve the same purpose.

What to Include in Your Complaint Letter

A letter of complaint needs enough detail for someone unfamiliar with the situation to understand and investigate it. Include facts that directly support the complaint, but leave out unrelated history, insults and guesses about another person’s motives.

1. Identify the recipient. Address the letter to the organization, department or staff member responsible for complaints. If you do not know the correct recipient, check the organization’s official complaint instructions.

2. Identify yourself and the matter. Give your name and any relevant account, order, case or reference number. Mask unnecessary sensitive details.

3. State what happened. Describe the event in date order. Include when and where it occurred, what you expected and how the actual result differed.

4. Mention supporting evidence. List the copies attached to the letter, such as a receipt, confirmation, statement, photograph or earlier correspondence.

5. Request a resolution. Say exactly what action you want, such as correcting a record, replacing an item, completing a service or explaining a decision.

6. Request a response. Ask the organization to confirm receipt and explain its decision or next steps in writing.

The phrases “letter of a complaint” and “letter for complaint” are sometimes used in searches, but “letter of complaint” is the standard English expression.

How Should a Complaint Letter Be Structured?

A clear complaint letter follows a simple order. Each part has one purpose, which helps the recipient review the matter without searching through a long narrative.

1. Opening: State that you are making a formal complaint and identify the product, service, transaction or event involved.

2. Factual summary: Explain what happened in chronological order. Use exact dates when known and distinguish facts from your opinion.

3. Previous contact: Briefly note any earlier attempt to resolve the issue, including the contact date and reference number.

4. Requested action: Describe the specific, reasonable resolution you are seeking.

5. Response request: Ask for written confirmation, a decision or an explanation of the next step. Do not assume a deadline unless the organization publishes one.

6. Closing: List the enclosed copies, provide your preferred contact method and sign the letter if submitting it on paper.

What Complaint Letter Template Can You Use?

Replace every bracketed placeholder in this letter of complaint template. Remove any line that does not apply, and do not add a deadline or policy unless you have verified it in the organization’s official information.

[Your name]
[Your mailing address or preferred contact information]
[Date]

[Recipient name or complaint department]
[Organization name]
[Official mailing address, if submitting by mail]

Subject: Complaint concerning [product, service, transaction or event] — [account, order, case or reference number]

Dear [recipient name or complaint team],

I am writing to make a formal complaint about [briefly identify the issue]. On [date], [describe what happened, where it happened and who was involved]. I expected [state the expected result], but [state the actual result].

I previously contacted [department or person] on [date] by [contact method]. The reference number was [number], and the result was [brief factual summary].

To resolve this complaint, I am requesting that [state the specific action you want]. I have included copies of [list supporting documents].

Please confirm receipt of this complaint and respond in writing with your decision or next steps. You may contact me through [preferred contact method].

Sincerely,
[Your name]
[Signature, if sent on paper]

How Do You Submit and Document a Complaint?

Use the organization’s official complaint channel so the letter reaches the correct team. Open the company’s official website and look for sections labeled Contact, Help, Support, Complaints or Customer Service. Follow the published submission instructions instead of sending the complaint to an address found in an unverified post or message.

1. Review the letter for accurate names, dates and reference numbers.

2. Attach copies of relevant evidence in a readable format.

3. Remove unrelated personal or sensitive information from the attachments.

4. Submit the complaint through the official form, email process or mailing address provided by the organization.

5. Save the final letter and every attachment exactly as submitted.

6. Record the submission date, delivery record, confirmation message and confirmation or case number.

If the complaint is submitted through an online form, save a screenshot or copy of the completed text before selecting Submit. Some forms do not provide a complete copy afterward.

How Do You Follow Up on a Complaint?

If no response arrives, first check the official complaint information for any published review period. Also check filtered email folders, mailed correspondence and account messages in case the response arrived through a different channel.

When following up, keep the message brief and refer to the original complaint instead of rewriting the full history. Provide your name, submission date, case or confirmation number, and the subject of the complaint. Ask whether the complaint was received, whether more information is needed and what the next step is.

Keep notes of each follow-up, including the date, method, person or department contacted and any new reference number. If the organization provides an internal escalation or review process, follow its stated instructions and attach the earlier complaint record. A follow-up can document your efforts and request an update, but it cannot guarantee a particular response time, decision or outcome.