How to Write a Letter of Complaint About a Colleague (With Sample)


1. When to Write a Complaint Letter About a Colleague?

A formal complaint letter about a colleague may be necessary if they:
Are rude, disrespectful, or unprofessional
Engage in harassment, bullying, or discrimination
Fail to perform their duties, affecting your work
Violate workplace policies or ethics
Create a toxic or hostile work environment

A written complaint ensures proper documentation and increases the chances of HR or management taking corrective action.


2. Best Practices for Writing a Complaint Letter About a Colleague

Stay factual and specific – Mention incidents, dates, and details.
Remain professional and objective – Avoid personal attacks or emotional language.
Provide evidence – Attach emails, witness statements, or company policies violated.
Request corrective action – Clearly state what resolution you seek.
Keep a copy – Retain a copy of your letter for reference.


3. Sample Complaint Letter About a Colleague

[Your Name]
[Your Job Title]
[Your Department]
[Company Name]
[Company Address]
[City, State, Zip Code]
[Your Email]
[Your Phone Number]
[Date]

[HR Manager’s Name]
[HR Manager’s Job Title]
[Company Name]
[Company Address]
[City, State, Zip Code]

Subject: Formal Complaint About [Colleague’s Name]

Dear [HR Manager’s Name],

I am writing to formally report an ongoing issue with my colleague, [Colleague’s Name], who works in [Department Name]. Despite my efforts to handle this matter professionally, their behavior has continued to negatively impact my ability to perform my duties effectively.

Details of the Complaint:

  • Incident(s): [Describe specific incidents, including dates, locations, and behavior. Example: “On [date], during a team meeting, [Colleague’s Name] spoke to me in an unprofessional tone and dismissed my input publicly.”]
  • Repeated Behavior: [Mention any patterns of misconduct, such as ongoing rudeness, harassment, or uncooperative behavior.]
  • Impact on Work: [Explain how the colleague’s actions have affected your work performance, team morale, or productivity.]

I have previously attempted to resolve this matter through [mention any prior discussions, emails, or informal complaints], but the situation has not improved.

Given the severity of the issue, I formally request:
✔ A review of [Colleague’s Name]’s behavior and appropriate action to address the situation.
✔ A mediation meeting with HR and relevant parties to discuss possible solutions.
✔ Assurance that retaliation will not occur as a result of this complaint.

I have attached [mention supporting documents, such as emails, witness statements, or reports] for reference. I expect a written response within [reasonable timeframe, e.g., “7 business days”].

I appreciate your attention to this matter and look forward to a resolution that ensures a professional and respectful workplace. Please confirm receipt of this complaint.

Sincerely,
[Your Name]


4. Where to Send Your Complaint Letter

HR Department – For workplace conflicts and policy violations.
Immediate Supervisor or Manager – If the issue affects work performance.
Senior Management or Ethics Committee – If HR is unresponsive.


5. Frequently Asked Questions

1. Can I submit my complaint anonymously?
Some companies allow anonymous complaints, but providing your name ensures better follow-up and accountability.

2. What if my colleague retaliates after I file a complaint?
Workplace retaliation is illegal. Document any retaliatory actions and report them to HR or management.

3. How long should I wait for HR to respond?
Most HR departments respond within 7-14 business days, but policies may vary.

4. Should I involve other employees in my complaint?
If other colleagues have experienced similar treatment, a group complaint may strengthen the case.

5. Can I take legal action if HR ignores my complaint?
Yes. If HR fails to address serious issues like harassment, discrimination, or workplace safety violations, escalate the matter to a legal professional or labor board.


Conclusion

Writing a complaint letter about a colleague should be professional, factual, and solution-focused. By providing specific details, requesting corrective action, and setting a deadline, you increase the likelihood of receiving a prompt and effective resolution. If ignored, escalate the complaint to higher authorities or legal channels.