Shows how to write an effective letter of complaint and gives a sample letter of complaint. Photo Credit Jacob Wackerhausen/iStock/Getty Images; You May Also Like. How to Write an Effective Complaint Letter. Complaint letters can be very effective. Write an effective complaint letter by getting to the point early, controlling your emotions and providing all necessary information for the reader. You. How to Write a Complaint Letter. Include your name, address, and home and work phone numbers. Type your letter if possible. If it is handwritten, make sure it is neat. Edit Article How to Write a Complaint Letter to a Company. Four Methods: Sample Complaint Letters Writing Your Complaint Letter Achieving the Correct Tone and Format. How to Write a Complaint Letter When writing a complaint letter, you want to keep it short and to the point to help ensure that your letter will be read in its entirety. I have been short paid and i do not know how to write letter to inform my director Edit Article How to Write a Letter of Complaint to Human Resources. Six Methods: Sample Letters Sexual Harassment Complaints Regarding Physical or Emotional Abuse. 1. Start your letter with something positive in order to soften the blow of your complaint and so that the company or entity will be more willing to work with you. Learn how to write a complaint letter. Create your own with must-know tips, easy steps, sample phrases and sentences. Write your complaint letter today.