How to Steps

1. Write down your complaint and what and who you are complaining about.

2. State clearly all of the facts which are related to and pertinent to the complaint that you are making.

3. Propose the terms of compensation or suggest the action to be done about the matter at hand.

4. End in a cordial and polite tone.

[Senders Name]
[Address line 1]
[Address line 2]
[State, ZIP Code]

How to write a complaint letter against co worker. Sample Letter.

[Letter Date]

[Recipients Name]
[Address line 1]
[Address line 2]
[State, ZIP Code]
[Subject: Normally bold, summarizes the intention of the letter] -Optional-

Dear Mr. Corner,

I am writing to you to report an event that transpired last September 10, 2007.

It involves my coworker, Mr. Christopher D. Perkins. He has been repeatedly breaching company protocol by looking through and even copying sensitive files. I myself have caught him in the act, and many others have caught him on several occasions. However, none has been able to get proof of such events. I however, have and I have enclosed the necessary evidence together with this letter.

(insert a detailed account of the events that transpired)

I hope that you do look into this matter and take the necessary actions which you deem proper for this sort of events.

Sarah F. Fabian

[Enclosures: number] -Optional-

cc: [Name of copy recipient] -Optional-