To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own.Due to unforeseen circumstances, I must resign. Add contact details, company name, and date. I believe it is important to leave on amicable terms, so I am committed to completing any pending tasks and ensuring a smooth transition of my responsibilities. This resignation letter is only for an employee who is resigning from a particular position, not the company itself. Clark's resignation and wishes to ensure an efficient transition of administrative duties through the period of time leading up to the effective date of Dr.