Legal letters are written in a "block" format, according to Purdue University. All parts of the letter must be left-aligned, unjustified, not indented, and styled using a legible font such as Times New Roman.
Start by providing the date on which you are writing the letter. Type the full name of the month, followed by the numerical day, a comma and the numerical year, recommends the Houston Chronicle. Skip one blank line, and type your name. Under your name, include the name of the business you represent. Type your mailing address in the next line, including your street number, street name, suite or apartment number, city and ZIP code.
Leave another blank line, then start typing the inside address, explains the Houston Chronicle. Begin with the recipient’s name, and use a proper title. If you are unsure about the recipient's profession, use a generic title such as Ms. or Mr., or a higher title such as Dr., states Purdue University. The recipient's business name and address goes under his name. Leave a blank line after the inside address, and write the salutation.
Use the same title and name that you included in the inside address, notes Purdue University. Skip another blank link before starting the letter body. Be concise, and remember to leave a blank line after every paragraph. Include a closing such as "Thank you," or "Sincerely," and write it two lines under the body. Leave four blank lines under the closing remarks, type your name, and affix your signature on the space above your name.