Writing a lengthy resignation letter is unnecessary, and a few paragraphs are sufficient. If an employee is rehired within one (1) year, the employee's service record will be reinstated and continuous employment will date from the previous hire date.Prepare a written, dated, signed resignation letter that indicates the effective date of your resignation. We are a diverse and progressive organization comprised of 6,055 employees and more than 50 different agencies. Hospitals as listed below. How to fill out the Director Resignation Letter Template for Companies? 1. Enter the date on the letter. 2.