Keep in mind that you should provide your employer with at least twoweeks notice. Learn how to write a resignation letter with a notice period.Hand the letter to your employer after you tell them that you have decided to leave your job. Make sure you give at least two weeks' notice. How long of a notice period should I give my employer? Download a free immediate effect resignation letter template, easily customizable for your personal situation. Clearly state your intention to resign and include the effective date of your resignation. Download a free formal resignation letter template with a 2 weeks notice period in Google Docs, Word, Pages, Outlook, PDF.