Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).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. This guide will explore how to write a good employee appreciation letter, along with samples and templates. Having dependable customers like you has helped our business tremendously during our difficult periods, so please know just how grateful we are for you. Learn how to write effective fundraising letters that inspire more support from donors. Explore best practices and templates in this comprehensive guide. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why.