Familiarize yourself with the guidelines before you start your letter. Many publications contain rules on how to write and submit a letter to the editor.
Start with your address and date. Any formal letter must contain all relevant information at the top left in full block format. List your address first, followed by the date on which the letter was written. This avoids confusion and makes it easier for the editor to get a quick response to you.
Include the recipient's details. Write the name and the address of the recipient on the left side of the letter. The editor probably will not be the one to open the letter, and it may be separated from its envelope.
Place the greeting under the address. Use a formal form, such as "Dear Sir," "Dear Madam" or "Dear Editor."
Begin the main text or body of the letter. Use single spacing with a blank space in between paragraphs in formal letters such as these. Avoid indenting.
Limit your letter to two or three paragraphs. In the first, introduce your problem and explain your objection. In the second, attempt a short argument in favor of your objection. Finish with an intelligent summary.
Write a formal closing, which is as important as the rest of the letter. Appropriate phrases are "Yours sincerely" or "Best regards" if you are better acquainted with the recipient.