Acknowledgment cards are small cards used to express gratitude or recognition. They are often sent to thank someone for a gift, support, or a kind gesture. These cards can be personalized with a handwritten message, making them a thoughtful way to show appreciation. Typically, acknowledgment cards come in various designs and can be purchased or made at home. They are commonly used in both personal and professional settings, such as after receiving a gift from a friend or a business colleague. Sending an acknowledgment card helps strengthen relationships and fosters goodwill.