A Letter to the Editor has no fixed structure. It may be long or short, angry or balanced and reflective. What they all have in common though is that they express a personal opinion on a matter, preferably something that is currently being debated.
The text should start with the phrase, Dear editor, and have your signature. Some people prefer to use a pseudonym or a nickname.
It is not considered very polite to attack other people in such a text. You should comment on an issue not a person and use polite language. Neither is it a good idea to appear too sure of yourself nor to be arrogant. Remember that in addition to what you actually say, the reader will also take into consideration how you express yourself.
Often, a Letter to the Editor is triggered by a particular political debate or events that affect a lot of people, locally or nationally.
Unlike essays and articles, which are mostly written by professional writers, Letters to the Editor are written by ordinary people. Therefore, Letters to the Editor are important indicators of what people are concerned about. It is, therefore, also an important part of our democracy.
Here you find examples of Letters to the Editor: 10 Letters to the Editor