Abstract: An article for detecting the presence, or the absence, of an analyte. The analyte is indicative of a change in the status of a packaged material. The article generally includes a facestock film having first and second surfaces, an adhesive layer adjacent to the facestock film, and a detecting system adjacent to the facestock film. A measurable analyte can be in vapor and/or liquid form, and the detecting system indicates whether the analyte is present. That is, the detecting system responds to contact with the analyte by indicating that such contact has occurred, or that the analyte is present.