One Week Notice Letter Example. Here's an example of a resignation letter from an employee who provides one week's notice: Collin JenkinsWhat is a resignation letter, and how do you write one? Here are sample letters and templates, as well as tips for how to resign gracefully. Please accept this message as my formal notice of resignation. I am fortunate to have received a long awaited opportunity that I cannot pass up. Below you'll find a sample resignation letter informing the employer that the employee is resigning due to a new job opportunity. You should give your employer notice of your impending departure. The period of advance notice should be one pay period. Write a formal letter.