Abstract: There is provided a dual-sided thermal medium which comprises a thermally-resistant substrate including a first side and a second side, a first coating on the first side of the substrate including at least one thermal color imaging component, and a second coating on the second side of the substrate including at least two thermal color imaging components, wherein the thermal resistance of the substrate is sufficient to prevent heat applied to one of the first coating and the second coating from imaging at least one thermal color imaging component of the other of the first coating and the second coating. Also provided are a dual-sided direct thermal printer, dual-sided thermal printing system, and method to image the dual-sided thermal medium.

Abstract: A method of reducing receipt fraud comprises attempting to detect emission from a receipt associated with one or more luminescent markers that are incorporated in a valid receipt. The receipt is validated when the attempt is successful.