State your resignation and provide the effective date. A short resignation letter is the way to go.Include your name, position, the date of resignation and the intended last day of work in the first paragraph. Learn how to write a resignation letter with a notice period. Please accept this letter as a notice of my resignation. 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. Ensure it is in a formal letter format. What are some tips for writing a professional resignation letter with a notice period?