But how do you transition from a fulltime job to a PRN job? Most importantly, what should be included in the resignation letter to an employer?In the first paragraph of a resignation acceptance letter, employers should directly acknowledge the employee's intention to resign. Resigning outside this timeframe can lead to a determination that you have "abandoned your contract" and a one-year suspension of your teaching certificate. If so, then you came to the right place! In this article, we provide you with guidelines on how to properly format your resignation letter.