Want to know how to write a retirement letter of resignation? Get the insights you need and free retirement letter template to help guide the way.Essentially, it's an official notice from an employee, communicating their decision to retire from their current role within the organization. How to write a great letter of resignation that will let you leave gracefully. Use a retirement resignation letter template to inform your employer that you plan to leave the workforce. " He and his wife are ready to enjoy retirement. So far this year, Moore has 17 resignation letters on his desk. Both REACH and OUSD wanted to follow up with a very specific type of tutoring.