A leave of absence letter is a formal request to take time away from your job. It outlines the reasons for being away, the duration of the leave and other important information that would ensure a smooth transition during the break in employment. As an official communication between employer and employee, a leave of absence letter should be written using precise language, following a clear and concise format, and addressing all relevant facts. Your leave of absence letter should demonstrate respect, appreciation and consideration for your employer and colleagues, while ensuring sufficient personal detail to effectively highlight the reason for requesting a leave of absence.