In this article, we offer some tips and examples to help you write a great thankyou letter to your manager. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). Discover how to write an impactful appreciation letter with tips on expressing gratitude, using sincere language, and fostering success. Looking for ways to say thanks to your boss? There are formal ways to express gratitude, funny ways, and everything in between. An employee appreciation or thank you letter is a formal message from an employer that recognizes the former's contribution to the company they work for. Writing a proper appreciation letter to employees can be time consuming. To ease out, use these letter samples, best tailored to suit different I'm grateful to have a boss like you. 2.