Leaving a job isn't easy. 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. I regret to inform you that, after much thought, I have decided to resign. Please accept this letter as a formal notice of my resignation. Dear Sirs: Effective immediately, I am not a member of UFCW Local 99. I am prepared to assist remotely in the transition of my responsibilities to minimize disruption. After pondering the matter for a long time, I have decided to accept an offer from another company. Notice of resignation: State in plain language that the letter's purpose is to inform the employer of your resignation.