Learn how to write a resignation letter due to family reasons with our stepbystep guide and sample letters. Dear Ms. Supervisor,.Please accept my resignation from my position at ABC Company, effective January 1, 2024. 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. Simply write a resignation letter that provides your last date of employment. There is absolutely no reason to discuss. The letter should be detailed but brief. Inform your manager of your decision, but keep it professional if the reasons are less positive. Be brief, direct and to the point.