It's pretty standard to give your employer at least two weeks notice when you quit. "Learn the essential steps and tips for writing a professional two weeks notice resignation letter.There's no question that you CAN walk out tomorrow without giving notice at all, let alone 120days notice. A 2 week notice is standard but employers are not obligated to agree to your resignation date. Typically, professional norms suggest providing a two-week notice period, so resigning more promptly can disrupt operations and cause logistical difficulties. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. 2) Write a resignation letter. I work in Pennsylvania and recently provided my two week resignation notice. My employer asked me to leave asap, and did.