Every resigning employee shall be urged to indicate in the Resignation form the reason for leaving. The following are the things to keep in mind when writing an immediate resignation letter: Write the date first.Explain only necessities. The best way to resign would be to type a letter, print it, then sign it and deliver it to the appropriate person. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. In the next paragraph, briefly express how thankful you are for the opportunities and experiences you've gained throughout your tenure with the company. No reasons are necessary.