This letter allows you to leave your current job in a polite and professional manner. It may contain reasons for resigning. The resignation letter is needed in case an
employee wish to vacate his/her position in a company in a professional way.
This cannot be made legally enforceable. It just ensures that you get your relieving letter after you leave the company. You may use it if you as an employee in a company want to inform your
employer that you wish to leave your position due to some reasons or the other.