A resignation letter is a formal written document submitted by an employee to inform their employer of their decision to resign from their position. It typically includes the employee's intent to resign, the official last working day, and, if appropriate, a brief explanation for the decision to leave. While not mandatory, many employees use the opportunity to express gratitude for the experiences and opportunities gained during their time with the company. The letter may also offer assistance in ensuring a smooth transition, such as training a replacement or providing guidance on ongoing proj