Writing a Letter of Complaint against Supervisor [with Sample]

Employment today can be full of frustrations and annoyances. You got to work late after having called in and explained why but even so you are scolded and humiliated by your manager. 

So how do you write a complaint letter about a manager’s behavior?

Here Are A Few Tips To Guide You:

1. Organization

Most written complaints often get ignored because of poor organization. These are usually not clear, are difficult to read and follow very poor letter writing format. 

A correctly written letter is more likely to get noticed just because it looks neat and professional. Your recipient will most likely notice your letter and read it if your complaints are well organized on paper. 

You do your work diligently but still, don’t get appreciated because of your age or gender. It can be frustrating when your effort and hard work isn’t recognized.

Worse still, it is frustrating when your manager seems to have a “thing” on you that you can’t explain. Sometimes, your complaints to the HR department about this particular manager don’t get anywhere. You can’t speak directly to the board members either because it is way above protocol.

The only option left is that you leave your complaints and grievances with the HRs secretary. And when you finally get a hold of the HR manager you are told that the office hasn’t received any record of your complaint. Does any of this sound familiar to you? Then it is time you put your complaint in writing.

So, when writing a letter complaining about manager behavior, you need to ensure that you have your name, address, the name of the manager and the account of events laid out.

2. Address The Letter To A Specific Person

When writing complaint letters, it is often advised that you address the letter to a particular person to receive a quick response. 

And in this case, it would be wise if you wrote the letter to someone of a higher rank than the manager you are complaining about. This is so that appropriate action can be taken without fear or favor.

Keep in mind that letters with generic addresses are often ignored or may sometimes be read by the wrong person. 

You wouldn’t want this to be the case, would you? So to ensure that you know who you are writing to and that you get their name and address indicated in the letter.

3. Be Honest, Polite And Respectful

It can be difficult to control anger and sarcasm when you are frustrated and annoyed. But even so, you need to try and maintain a calm and polite attitude if you want your complaint to get anywhere.

So, if you don’t want to alienate your reader, try to avoid witty, sarcastic, satiric, and insulting language when stating your complaints and even when referring to the manager you are complaining about.

4. Be Factual

When stating any events relating to your complaints, you need to be concise about the dates, venues and what went down during these incidences. This will add to your credibility and even boost the willingness of the reader to want to help.

5. Use A Sample Letter

Using a sample letter as a guide to writing your complaint can assure that your letter will follow the right format and organisation. A sample letter provides you with a template that guides you on how the letter should be structured.

It also provides you with a clear rundown on how to correctly phrase your grievances.

Therefore, you need to take time to understand the appropriate way to write a complaint letter to be able to draft one yourself that will be recognized quickly, read and even responded to immediately.

Here is a sample letter that you can use:

Sample Letter Of Complaint Against Supervisor

Employee’s Name
Employee’s Address
City, State, Zip Code


Employer or Human Resource Person’s Name
Name of Company
Address of Company
City, State, Zip Code

RE: Complaint Against Supervisor

Dear Name of employer of Human Resource Person:

I am writing this letter to inform you of the behavior of one of the managers in this company——– (manager’s name). 

I am referring to the constant discrediting, use of abusive language and intimidation that I have been experiencing from —– (manager’s name) especially on DD/MM/YYYY.

I have tried to bring this issue to your attention to no avail. It is, therefore, my wish that you try to find out what the problem is and act on it in the best way possible.

I love working here, and I know that this is a company that holds true to employee wellbeing. As such, I trust that you will handle this matter amicably.

I am looking forward to a positive response.


Employee’s Signature
Printed Name of Employer

Related Posts

Writing a Complaint Letter About Workplace Harassment
I am writing this letter to inform you about racial slurs and vulgar jokes that have been directed at me for the past month by a co-worker, [Name of Harasser]. 

Sample Demand Letter for Unpaid Wages
As of this date, wages in the amount of [amount] are owed to me. I request that payment be made in full five business days from the date that this letter is received.

Writing a Simple Letter to Attorney Requesting Help
I have attempted to reach you by phone on (dates of phone calls) to find out about (the standing of my case). It has been (how long?) since we have communicated.

How to Write a Demand Letter [with Sample]
I am requesting you to give me the full deposit by the end of next week on DATE. If it is not returned to me on or before that date, I will take the issue to small-claims court.

Writing a Demand Letter for Unpaid Wages [with Sample] 
I was recently let go from my position as [Job Title] on [DATE]. I am writing this email because I am still owed my last pay check in the amount of [$$$]. I respectfully demand that you pay the full amount owed to me within seven business days.