A disciplinary letter is a written warning issued by an employer to an employee regarding inappropriate behavior. The purpose of the letter is to set out a clear understanding that continued unacceptable behavior could lead to further action, such as dismissal or suspension from work. Disciplinary letters need to be carefully worded so that the recipient understands why the letter has been issued, and the consequences should the behavior persist. They should also contain appropriate guidance on how to rectify any issues raised in the letter.