Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. We cover just that in this blog!You can learn how to write a customer appreciation letter and get many samples below. Discover over 27 thank you note to client templates to show customers you care. Enhance customer loyalty with these easy-to-use messages. Use one of the sample letters provided here to get started writing a letter that conveys just how much you appreciate someone's actions. Begin your letter with a greeting that includes the customer's name. Make sure the customer's name is spelled correctly. Use one of these 'thank you for your business' message templates to express genuine appreciation. I just wanted to thank you for being a great customer and let you know that we value your business.