Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Specify which of the employee's skills you value in particular. This is just a note to let you know how pleased I was with the service I received. Your employee(s) (names if available) were especially helpful. The message of appreciation should stand alone. Be brief, warm, and sincere. Discover 40 heartfelt thank you note examples for friends, family, and co-workers. Express gratitude with personalized greeting cards. Sample Thank You Letter 1.