I would not give any reason for leaving. Professional resignation letter examples for different reasons.Free templates and writing guide to resign on a positive note without feeling awkward. Without going into too much detail, explain the reasons for leaving. These top samples of resignation letters for personal reasons can be used as helpful templates when you are looking to resign due to personal circumstances. Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates. Learn how to write a professional resignation letter with our step-by-step guide and easy to use templates. What should I include in a resignation letter for family reasons? But the purpose of a resignation letter (at least in the US) is just to establish that you're leaving voluntarily, for legal reasons. I am available to assist with training my replacement or completing any outstanding projects.