The header at the top of the resignation letter (the same thing as a letterhead) should include your name, address, phone number and email. Clearly state the resignation, the last working day, and any necessary details.Avoid unnecessary information, and keep the text to the point. In this guide, I'll cover how to effectively resign from a board, the key elements to include in your letter, and provide examples of resignation letters. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. Even if your employer isn't expecting a two weeks' notice letter, it will put you in a good light as you move on to something new. I will document and share the status of my projects and, if desired, assist in the search for a replacement. Best,. I hope to cross paths with you again in the future. Sincerely,. (The United States-based convention for formatting a date places the month before the day.