Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).I want to let you know that we are exceedingly satisfied with your recent performance and your fantastic job on the < project name >. This is one of the most important memos or letters you will write because it builds good will, respect, and cooperation. A thankyou letter provides an excellent opportunity to show gratitude for someone's time and effort. They also present you, the sender, in a positive light. A simple yet powerful tool, these letters can express gratitude, boost morale, and improve job satisfaction. 7) I wanted to acknowledge the impact you've made on my career. The message of appreciation should stand alone. Be brief, warm, and sincere.