Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).In this article, we discuss some reasons you might choose to thank your boss formally, share 17 thank you message for your boss examples and provide a template. Below you will find sample appreciation letters to send or email an individual or individuals who have helped you at work. "I am very grateful for your assistance with my senior project this semester. " "Without you, I wouldn't be the student, or person, that I am today.". Here are some tips on how to write your appreciation letter in a thoughtful way. Some kind words from our patients. Dear Dr. Clark, I am writing this letter to you to express my sincere gratitude to you and your entire staff. Please do not include a date in your letter as your letter will be shared with donors later in the year.