Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).You should send a thank you letter after any professional contact has been made. A simple yet powerful tool, these letters can express gratitude, boost morale, and improve job satisfaction. We are fortunate to have you with us. Thanks for your support and dedication. The message of appreciation should stand alone. Be brief, warm, and sincere. Appreciate their hard work and dedication; 2. Praise them for a job done well; 3.