What do you write in a teacher Retirement Letter? Termination of your membership in CCCERA can occur for a variety of reasons, but usually this means you no longer work for an employer participating in CCCERA.In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. The employee must have been employed full-time in the Contra. Use a retirement resignation letter template to inform your employer that you plan to leave the workforce. Forms for Retired Members. Submit original documents only.