Consider the following resignation letter examples: Click on the image to download our two weeks resignation letter example. How to write a resignation letter that's effective immediately?Learn how to write an immediate resignation letter with our comprehensive guide, including tips, examples, and a customizable template. Dear Sirs: Effective immediately, I am not a member of UFCW Local 99. A one (1) week notice letter is written notification provided to an employer that an employee will no longer be working with the company within seven (7) days. A one (1) week notice letter is written notification provided to an employer that an employee will no longer be working with the company within seven (7) days. Please accept this letter as official notification of my resignation from my position as Floor Manager, effective immediately. (For example, "I regret to inform you that I will be resigning from my position, effective immediately. Please accept this letter as my formal resignation. Today will be my last day of work.