State your resignation and provide the effective date. Start with a two weeks notice letter.This will serve as a formal, written documentation of your intent to leave and your transition timeline. You should attempt to give your employee at least two weeks notice. A short resignation letter is the way to go. Include your name, position, the date of resignation and the intended last day of work in the first paragraph. As briefly and succinctly as possible. Do not explain anything. I am resigning effective (date; give 2 weeks notice). When To Provide a Resignation Letter.