Learn how to write a short notice resignation letter with this stepbystep guide, template and examples of formal resignation. Two weeks' notice is typical, but isn't a hard rule.Bottom line: Put the date in writing. Specify your last working day within two weeks from the notice date. Clearly state the final day to avoid misunderstandings. In MN. I gave 2-week notice to my employer. You want to give at least a two weeks' notice. It confirms both the fact that you are leaving your job and the date of your last day. A resignation letter may also be called a "Two Weeks' Notice Letter. Up to 150 words is good enough.