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?Below are three sample resignation letter templates, written for different scenarios. A resignation letter is a way to formally end your employment and provide details such as an end date and contact information. 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. Dear Sirs: Effective immediately, I am not a member of UFCW Local 99. Dear Sirs: Effective immediately, I am not a member of UFCW Local 99. Start with a two weeks notice letter. This will serve as a formal, written documentation of your intent to leave and your transition timeline. It is my regret to inform you that I must hand in my resignation as head of security at Cornado Center.