Learn how to write a resignation letter (and what not to include) and then use our example letters as a guide. Add contact details, company name, and date.Use their name and formal title, such as "Dear Mr. Smith" or "Dear Dr. Johnson. Dear (HR Manager's Name),. Asked if Wayne DeGesaualdo would like to fill this position. (If supervisor has resigned, you MUST attach copy of resignation letter. As a result of his investment success, Buffett is one of the best-known investors in the world. Picture yourself finally completing all your tasks.