It's best to tell your boss that you're moving on to the next step in your career "facetoface or over video call," with at least two weeks' notice. How to write a resignation letter that's effective immediately?In this blog, you will learn: What a resignation letter is. Why a resignation letter is needed. Add contact details, company name, and date. Learn how to write a heartfelt resignation letter with our guide. Includes examples and tips for a sincere and graceful farewell. Your resignation letter should be to the point, concise, and clear.