A resignation letter is a formal notice stating your intention to leave your job. It typically includes details like your last day and potential next steps.Completion of this form is self-explanatory and the word that is not applicable, either "resignation" or "transfer," shall be deleted. Facing workplace issues? Learn how to write an effective constructive dismissal resignation letter. Say as little as possible in your resignation letter. Just state your intent, and your proposed final day of work.