To write a short notice resignation letter, include your position and effective date, explain your reason and express gratitude. The complete guide to writing your resignation letter including expert tips, free copyable samples, and templates.In this article, we share tips for writing a short, simple resignation letter and offer examples for you to reference when creating your own. Professional resignation letter examples for different reasons. Free templates and writing guide to resign on a positive note without feeling awkward. The employee shall specify the effective date of resignation. 1. Within one work day, provide a copy of the constructive resignation letter to the employee's union, as authorized. 23.3 Effective Resignation. We conducted an employer survey earlier this year to answer questions related to The Great Resignation in Contra Costa County. Are local employers hiring?