Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. Learn how to write a professional resignation letter with our step-by-step guide, easy to use templates and helpful tips.Master the art of writing a resignation letter with our comprehensive guide, offering step-by-step instructions, tips, and templates. 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. Dear (Manager's Name), I'm writing to you today to submit my notice and resignation letter. Sincerely, Me." Then sign and date it. Hand it to them. Done. 15, 2010) (attaching resignation letter of Lee. Ken Pratt, CEO, will soon be sending his resignation letter, to be effective 12-31-18. "Our country is facing a grave challenge," Freeland wrote in her resignation letter.