Patent attributes
A payment card includes hidden features (e.g., textual messages, graphics, emphasis features associated with conspicuous features of the payment card, or the like) undiscernible under only visible light, but discernable under ultraviolet light. The hidden features can be incorporated into multiple layers of a side of the payment card and can be present at different transparencies. A container (e.g., presentation box) can include a circuit to detect when the container is opened and cause the hidden features to be illuminated with ultraviolet light. The ultraviolet light source can be incorporated into the container itself, or can be incorporated into the payment card (e.g., activated by supplying a signal to the payment card from the container).
