Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Download this letter of appreciation to show your staff how much you value their hard work. Sending out customer appreciation letters is an excellent way to connect with your clients. Learn how to write a customer appreciation letter here. Thank you very much. These public service documents are strictly honorary and are not legally binding. All requests will be reviewed on a case-by-case basis. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. This guide will explore how to write a good employee appreciation letter, along with samples and templates.