A resignation letter is a formal document that an employee submits to their employer to announce their decision to leave a job. This letter typically includes the employee's last working day and may express gratitude for the opportunities received during their tenure. It serves as a professional way to communicate the departure and helps maintain a positive relationship with the employer. Writing a resignation letter is important for several reasons. It provides a written record of the resignation, which can be useful for both the employee and the employer. Additionally, it allows the employee to leave on good terms, which can be beneficial for future references or networking opportunities within their industry.