Just write the facts of why you're leaving and ask them to not try to get you to change your mind. "I am no longer a member of this church.I do not need your permission, nor do I care whether or not you agree with my decision. "Signed,. Customizing your Leaving a Church Letter is easy with Jotform Sign. How to write a church resignation letter Use the appropriate salutation. You will also want to specify the last possible date you're able to work. In addition to that, you can give a brief statement explaining your decision to leave. A church resignation letter is a formal way of letting the leader of the religious organization know your intention of leaving the current position. I did leave, and am now in a new place much better for me. Thank you, thank you, for all you've done, for your sweet heart for the Lord and for your neighbors.