A law school addendum is a brief (no more than one page) essay that is written with a purpose to legitimately rationalize or give an explanation to weak points in your application. Kinds of Law School Addendum There are two main types of law school addendums that can be written in addition to your application. Required addendum Fitness and Character Addendum. Many law schools contain Fitness and Character section in their application. In this section, the applicant should give information on his or her past, usually focusing on behavioral issues that might have happened. Usually, schools ask that you reveal your personal information like whether you have ever been charged, arrested or convicted a misdemeanor or a crime, or punished/sectioned by your university for any reason.