How much notice should I give? It is standard practice to give at least a two-week notice.A two weeks' notice letter of resignation is a professional courtesy and at times a contractual obligation. Here's how to let your boss know you're leaving. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. My last day available for work will be on . No need to get all mushy or tell them why you are leaving. A two week's notice letter, or resignation letter is a formal way to inform your employer that you are leaving your retail job. Giving a two-week notice letter is a professional way to inform your employer that you intend to resign from your current position.