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. A simple, handwritten thank you note goes a long way to express gratitude for time, service, sponsorship, donation, etc. A letter of appreciation is a formal or casual way for employers to thank employees for their hard work. Explore our templates now! I want to congratulate you personally for completing your year with < company name >. It has been a pleasure working with you. Thank you for your service in the military. You are a courageous hero and very much appreciated.