Looking to resign with a One Month Notice Resignation Letter? Use our resignation letter template for notice-period roles.In this article, we discuss how to create a 30day resignation letter, why it's important and provide a template and examples to help you write your own. Learn how to write a resignation letter with a notice period. I regretfully have to inform you that, after much thought, I have decided to resign and please accept this letter as a formal notice of my resignation. One month's notice period may not necessarily mean 30 or 31 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. Learn how to write a 30day resignation letter. Read key tips for crafting a respectful notice for maintaining professional relationships.