To begin, organize your thoughts and outline your argument. Then, draft your letter, keeping in mind that it should be professional and courteous.
Be sure to include all necessary information such as your name, address, and contact information. Include a deadline by which you expect a response. Finally, proofread your letter for grammar and punctuation mistakes. Here are some additional tips on how to write a complaint letter:
Be specific and concise. Be sure to include the who, what, where, when, and why of the situation.
Keep it professional.Keep the tone of your letter polite but firm.
Be patient. Remember that it may take some time for the issue to be resolved.
Provide evidence. Include any documentation or evidence that supports your claim.