Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Express gratitude in a heartfelt way. Send a note using Canva's free and customizable thank you letter samples. In this article, we offer some tips and examples to help you write a great thankyou letter to your manager. Sample Appreciation Letter to Employee. As always, thank you so much for doing such an excellent job managing this department. Here's information on when and how to say thank you to your manager, with examples of the best way to relay your appreciation to your boss. In the first sentence, say you're grateful for the employee's amazing work. Specify what they've done recently to impress you.