I want to convey my heartfelt gratitude to all the members of the foundation who work tirelessly to make the world a better place for individuals like me. We cover just that in this blog!You can learn how to write a customer appreciation letter and get many samples below. Learn when and how to write a thank you letter to your customers and review a template and two examples to help you craft your own letter. 42 customer thank you card ideas to show your appreciation. 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. We truly appreciate it. The message of appreciation should stand alone. Be brief, warm, and sincere. A thank you letter is an easy way to show customers you appreciate them.