How To Write A Leaniency Letter To A Federal Judge . This information should come in the last paragraph. Make sure you write your full address at the top of the page, including your house number, street, postal or zip code, county or state. Leniency Letters from West Branch Rose City Teachers from wbrcteachers.blogspot.com Use a business style to the letter, which means the text of the letter should be aligned evenly with the left margin, according to the law dictionary.org. I’m writing to ask for mercy on behalf of [name of friend], who was found guilty of [basic assault] on [date] and will be punished on [date]. It’s always a good idea to state your purpose very clearly at the beginning of the letter.