In this article, we discuss how to write a resignation letter when you're unhappy with management and we offer templates and examples you can use as a guide. Dear (Manager's Name),.I'm writing to you today to submit my notice and resignation letter. Write your letter, saying that you've enjoyed your work and appreciate that they gave you opportunity to work for them. Looking to resign with a Unfair Treatment Resignation Letter? Use our resignation letter template for reason roles. Master the art of writing a resignation letter with our comprehensive guide, offering step-by-step instructions, tips, and templates. The following sample resignation letter includes details on why the employee finds conditions unsatisfactory. Dear (name of manager),. My final day will be January 14, 2020.