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The Global Insight

How do I write a letter of complaint about a coworker?

Author

Robert Miller

Updated on March 29, 2026

How to write a formal complaint letter about a coworker

  1. Try to resolve the conflict on your own.
  2. Make sure you have an issue to report.
  3. State the purpose of the letter.
  4. Include a lot of details.
  5. Explain your involvement in the situation.
  6. Propose a resolution.
  7. Make a copy of your letter.

How do you write a complaint letter to an unprofessional employee?

A Formal Complaint Letter to HR Template My name is (name) and I would like to inform you of the unprofessional behavior I experienced at your place of business on (date) at (time). Add detailed paragraphs describing the incident or incidents. Finish with your desired outcome for writing this letter. Sincerely, (name)

How do you write a respectful complaint letter?

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  1. Be clear and concise.
  2. State exactly what you want done and how long you’re willing to wait for a response.
  3. Don’t write an angry, sarcastic, or threatening letter.
  4. Include copies of relevant documents, like receipts, work orders, and warranties.
  5. Include your name and contact information.

How do you write a letter of unprofessional behavior?

Dear (Name/employee), I am writing to you because I would like to discuss your very unprofessional behavior. As a very successful business company, we cannot afford to have any bad reputation. (Describe in your own words).

How to make a complaint about a co-worker?

Continue writing something like, “Because of several incidents that have occurred between her and me, I feel that it is time to make an official complaint.” Then, write about what happened between you and the co-worker. List each incident separately and with the respective dates.

How to write a complaint letter at work?

As an employee, if you want to make a formal complaint about something which has happened at work, you should raise a grievance. A few tips you could use when drafting an Employee complaint letter include: Identify exactly the kind of workplace harassment that took place. Write down the details about the harassment.

When to write a formal complaint to management?

Writing a complaint letter to management for example about a specific situation that happened on the job is very common. When addressing a letter of dissatisfaction in such a manner this is also called a formal complaint. By doing so you have documentation to say that you did, in fact, complain and want a resolution to come from it.

How to complain about workmanship in a contract?

Use the particulars of the contract or agreement as you register your complaint. Stick to the details of the agreement, so the letter is not an attack on a particular person. If you feel you must pursue legal action, tell the reader in a direct, respectful way. Copied!