This sample resignation letter is available for use on UpCounsel. Pdf) or read online for free.Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips. FM-6020, Letter of Resignation This form will be used when an employee voluntarily resigns from the Miami-Dade County Public Schools. Adobe Acrobat Reader is required to view and fill the forms on this page. A simple resignation letter format includes a resignation statement, an appropriate notice period, and an expression of gratitude. MIAMI-DADE COUNTY PUBLIC SCHOOLS.