Just write the facts of why you're leaving and ask them to not try to get you to change your mind. Create and write an official letter to announce your departure from a church.Download finished copies as PDFs. A church resignation letter is a formal written notice announcing the intention to leave a position with a religious organization. This letter serves as my resignation. The Board of Elders wants to reach out to you personally to address the recent events in our church and to provide you with an update.