this invention converts commercially available plastic id cards , usually made of pvc , and / or electronically printed documents , e . g ., laser printed documents , photo copier printed documents , dye - sublimation printed documents , ink jet printed documents , into time dependant , self - expiring badges or documents that display a visual indicia , e . g ., change of color , appearance of a word , e . g ., void after a specified or predetermined period of time . broadly , a pressure sensitive security sticker is applied to these commercially available plastic id cards and / or electronically printed documents . the sticker changes color , typically from white to red , after a predetermined period of time . this change in color is caused by the toner / dye / color pigment contained in these documents . the sticker provides a time dependent indicator for these documents . these security stickers can also display words like ‘ void ’ after the expiration of the document or card so that security personnel will readily recognize that the id credential or document is no longer valid .