Taylor discusses 6 key aspects of writing a resignation letter, including when to give notice, what to say, how to format it, and how to deliver it. State the Position You're Resigning From With An Effective Date.Here are the basics: Date it the day you plan to notify your boss, company, or HR, whatever. I'm writing to you to formally resign from my employment. I've enjoyed my time at (company), but I have officially accepted a new role. A basic resignation letter should include the fact that you're resigning and the last day you will work. Dear (Manager's Name):. This job aid describes the process for submitting your resignation letter.