Show your customers you value their business. Customer appreciation holiday cards are the most important message that your business can send during the holiday season. By sending a special appreciation card, you warmly convey to all your clients and customers just how much you value their business. During these busiest times of the year it becomes easy to neglect our responsibilities as good neighbors to all our customers. When you take a moment to send a personal message of seasons greetings and appreciation, you speak to your customers of your commitment to loyalty, integrity and good will that is certain to be returned.