Dear Board Members: Please accept my resignation from the Miami-Dade County Public Schools for the following reason(s):. You probably won't have to, but some companies do require a formal letter, so you'll have to check with HR as to whether you need to write one.Taylor discusses 6 key aspects of writing a resignation letter, including when to give notice, what to say, how to format it, and how to deliver it. Letter of Resignation This form will be used when an employee voluntarily resigns from the Miami-Dade County Public Schools. FM-6020, Letter of Resignation This form will be used when an employee voluntarily resigns from the Miami-Dade County Public Schools.