What do you write in a teacher Retirement Letter? Refunds 1; Service Retirement 9; Working After Retirement 2; All 38.In the opening paragraph, make it clear that you are retiring. Linked below are templates for resignations and retirements. Please be certain that your letter is signed, dated correctly and addressed to your administrator. I am writing to you today to inform you all that I am resigning. The voices and concerns of educators and students have been ignored for far too long. To retire with Teachers Retirement System of Georgia (TRS), access the TRS website to complete the online application. In the body of the letter, state your intended retirement date (your last day) and your thoughts on a transition plan. The address section should begin with your name and contact information.