Discover 40 heartfelt thank you note examples for friends, family, and co-workers. Express gratitude with personalized greeting cards.Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word). The message of appreciation should stand alone. Be brief, warm, and sincere. In the first sentence, say you're grateful for the employee's amazing work. Specify what they've done recently to impress you. In this article, we explain what an appreciation letter is and how to write one with tips, examples and seven easy steps to write your own. This resource covers the parts of the basic business letter and provides three sample business letters.