This is the best way. Include your DOB and member number if you have it in the text of the letter.As an American you have freedom of religion, and that means that you don't need anyone's' permission to join or resign from any religion. Just send your letter with your birth date and your current address to member records. They want to resign their church membership without having to interact with a bishop or any other lay leader. Can a church refuse one a letter pulling your membership at your request. A church's charter or bylaws typically specifies procedures for the convening and conduct of church membership meetings.