You want to give at least a two weeks' notice. First, in the US, you do not need the letter to be accepted.When you write a letter of resignation, you have quit. Offering to stay two weeks is the standard in an effort to help transition the work etc. The employer is not required to continue employment to fulfill the "courtesy" two (three) week notice of resignation. In this article, we cover everything you need to know about writing a resignation letter without notice and provide an example to get you started. Formally request a relieving letter saying that you worked from this date to that date. Never mind if they won't provide one. To clarify, such contracts will only specify notice periods and the requirements to tender your resignation. When you resign from a job, the standard practice is to give two weeks' notice to your employer.