Learn how to write a board resignation letter to leave your board position with grace and professionalism. Here's how to prepare for and manage your board resignation, to help ensure the organization remains resilient and effective.Learn how to resign from a board effectively. The majority of board members serve out the entirety of their terms with no problem. When stepping down from a director position, it's useful to offer a letter of resignation as formal documentation of your intent to leave. There are many reasons that nonprofit board directors accept a board position and then resign before their term is over. Ensure you clearly state your reasons for resignation, maintaining a respectful tone throughout.