Letter withdrawing my forty year membership from my church. I joined TNPC last month; however, I still need to write the letter officially terminating my membership at my parents' Methodist Church.I wish to bring to your attention a matter of personal significance- my decision to end my membership with our church. Got my membership withdrawal letter. Create and write an official letter to announce your departure from a church. Download finished copies as PDFs. Write a long, nasty, mean-spirited letter to explain everything that they dislike about the church and articulate their own self-pity at length. You can always write a formal letter to your local church board stating your request and the reasons why.