A resignation letter is a formal document presented by an employee to their employer to announce their intention to leave their current position. It is the recommended practice to provide at least two weeks’ notice before resigning, and all resignations should be in writing. A resignation letter should include the date of the employee’s last day, a brief explanation of their decision to leave, and expressions of gratitude for any support provided throughout the employee’s employment. Resignation letters are a necessary part of any business relationship and can be used to create a smooth transition for both the employee and employer.