Resignation acceptance letter template. For either Resignation or Retirement, you will be completing and submitting the Form-100.Click on the link to complete a Form-100. Do I need to fill out an application eachyear? No. We make the enrollment process easy; you will only have to enroll once and not every year. 2. Resignation from the Board does not mean resignation from the League. A resignation letter should be written at least 30 days prior to the effective date of resignation. More than 60 people have died in the Tarrant County jail since Billy Waybourn took office in 2017.