How To Write A Parental Leave Letter . It needs to convey the reason for the leave. How to write a maternity leave letter. Maternity Leave Letter Template Directgov Download from templates.coloring.best Include exact dates for when you will leave and resume work. Dear sir, i want to inform you that my maternity leave is over, and my health is also perfect. It should be a formal business letter and sent at least one month before the leave will start.