Legal letters are formal and purposeful letters which must be written in a clear and concise manner. Clarity and brevity are the two key factors to keep in mind while writing legal letters.
You must begin your letter by introducing yourself and also state the purpose of your writing. The body of the letter must explain the reasons for this letter. Explain in a logical and sequential manner maintaining clarity in both content and language.
As legal letters can have repercussions, it is a good idea to carefully edit your letters and check for factual and linguistic errors. As legal implications can depend on the turn of words and phrases, use simple and unambiguous words and sentences.
Legal letters must include what kind of remedial or corrective action you wish the addressee to take. It is usual to give a fixed time-frame for such an action.
The final paragraph can include what kind of action you may be pushed to take in case you do not get a positive reply. Keep the tone of the letters firm and polite. Avoid any implications of threat or rude statements in your letters.