Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).I would like to formally and sincerely express my gratitude for your amazing work. 5 Employee appreciation letter best practices 1) Be timely. I want to congratulate you personally for completing your year with < company name >. It has been a pleasure working with you. A thankyou letter provides an excellent opportunity to show gratitude for someone's time and effort. They also present you, the sender, in a positive light. You can find 13 samples of employee appreciation letters below. Additionally, you can use our editable templates for employee appreciation cards.