Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).I want to convey my heartfelt gratitude to all the members of the foundation who work tirelessly to make the world a better place for individuals like me. This guide will show you: A sample letter of appreciation for support better than 9 out of 10 other samples out there. I am writing to thank you for your continued generosity that makes it possible for me to attend the Georgia Institute of Technology. Every time I think about all the things that you've done for me, I'm filled with a sense of awe and gratitude. Thank you very much. Thank you for your service in the military. You are a courageous hero and very much appreciated. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why.