Ensure the most current form has been submitted. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.Learn how to write a resignation letter with a notice period. This article teaches you how to write a resignation email with the help of resignation letter email examples and our resignation email template. Your computer must have the Adobe Acrobat Reader installed in order to view any of these documents. Letters of resignation should be addressed to the County Superintendent of Schools and directed to Human Resources. In this article, we discuss how to create a 30day resignation letter, why it's important and provide a template and examples to help you write your own. If the Employee retires from full-time. CERTNA, the Employee shall provide ninety (90) calendar days advance written notice. A shorter notice period is provided for in the applicable Schedule A and shall continue for a period of not less than five (5) working days.