How To Write A Customer Appreciation And Holiday Invite Letter . Customer appreciation email example from dorothy perkins. Words of gratitude (“we are grateful for your many years as a loyal customer.”); FREE 44+ Appreciation Letter Templates in PDF from www.sampletemplates.com Our guide to the seasonal ecommerce rush focuses on five stages: If they customized an item in your shop, let them know that you enjoyed making it. I am fine as well and wish to pass on my warm greetings to you and your family on this occasion of christmas.