Since the letter of resignation is considered a business letter, keep the opening brief, formal and to the point, CFI advises. I will go over a step-by-step resignation template letter you can use, how to structure it and provide examples of resignation letters.Please accept this letter as a notice of my resignation. Complete a resignation form. Resignation Acceptance Email templates: Discover how to write an effective resignation acceptance letter. If a grade has been earned for any part of term in a semester, a resignation cannot occur.