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 letter of appreciation is a formal or casual way for employers to thank employees for their hard work. Explore our templates now! The message of appreciation should stand alone. Be brief, warm, and sincere. Thank you for your service in the military. You are a courageous hero and very much appreciated. I want to thank you for allowing me to be part of your career journey and appreciating my help and knowledge.