Taylor discusses 6 key aspects of writing a resignation letter, including when to give notice, what to say, how to format it, and how to deliver it. State the Position You're Resigning From With An Effective Date.Here's a resignation letter template you can use to ensure a smooth transition process and avoid losing your connections as you move forward. The best time to resign is at the end of the day, and on a Monday or Tuesday. The end of the day timing is for your benefit. By writing a concise letter, you'll already be keeping things clear and professional. A resignation letter is an official notice you send or hand in to your employer, letting them know that you plan to leave your position. Start with a statement of resignation: Don't try to build up to the news or share it indirectly. (employer) Please accept my resignation as of ………. My resignation is effective immediately.