A resignation acceptance letter is a formal way to acknowledge that you accept your employee's request to resign. Template for an employer to acknowledge an employee's resignation.Learn how to write a professional resignation acceptance letter with our helpful guide. Learn to write a resignation acceptance letter. You are required to serve the notice period or pay equivalent sum in lieu thereof in terms of your letter of appointment. According to the Employment Act 1955, employers technically cannot reject your resignation. This is because of Section 12 of the Act.