Resignation acceptance letter template. Learn how to write a professional resignation acceptance letter with our helpful guide.Below is a sample union resignation letter. You should check your union's constitution and bylaws to see if it is specific to whom a resignation must be sent. Resignation Acceptance Email templates: Discover how to write an effective resignation acceptance letter. Explore why a good resignation letter is important and how to write it, and check out our free resignation letter examples. In this guide, I'll cover how to effectively resign from a board, the key elements to include in your letter, and provide examples of resignation letters. My resignation is effective immediately. Dear (Manager's name),. I respect your company and I am thankful for all the opportunities given to me.