Managers should request a formal resignation letter to be kept in the employee's file, if it was not initially produced. The employee's written request must be made within 15 working days of termination.Just write out a basic letter to them, stating your basic details, the date you told them you were leaving, and the date you intend to leave. I have a couple questions on the proper process of accepting a resignation, as well as filling the vacant position. MN: Gave 2-week notice to employer, taken off schedule immediately, now being told they won't pay out my PTO due to not giving 30-day notice. It seems employment terminations inevitably result in a demand letter, agency charge, or lawsuit (and sometimes all three). Resignations in Minnesota. An application for reemployment need not follow any particular format.