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. If people are gracious enough to let me know they are leaving, I write them a letter and thank them for their attendance and past service. A church resignation letter is a formal written notice announcing the intention to leave a position with a religious organization. I write today to announce my resignation as Rector of the Church of BethesdabytheSea. This serves as a formal written notice stating the intention to leave the church position. Actively seek to resolve the challenges before you. Some church by-laws give direction on what must happen during a time of transition. In the top lefthand corner, include your content information, including your name and address.