Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).I truly appreciate your hard work and dedication. Please keep up the outstanding performance! Your hard work, expertise, and ability to overcome challenges were instrumental in its success. Thank you for your dedication to excellence. The basic Thank You Note Formula: Opening Thanks – Always start your note with a salutation: Dear So-and-so. The message of appreciation should stand alone. Be brief, warm, and sincere.