It is standard practice to give at least a twoweek notice. The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates.Use one of our resignation letter templates. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. Write a clear, professional resignation letter with our templates and examples. It is standard practice to give at least a two-week notice. If you have a leadership position or a. 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.