Also, if the tape is peeled off, a layer remains behind and on it the word opened warns the recipient that it has already been tampered with. As an added safeguard, sequential serial numbering is available. SecuriSeal comes in a standard 2" width in red with black lettering featuring a hidden message, "Tamper evident/Please inspect seal."
National Packaging Services Corporation: Tamper-evident tape
SecuriSeal(TM) from National Packaging Services (Ridgefield, NJ) is a tamper-evident tape intended to counteract theft. The tape is designed so that if slit, no other tape can adhere to it because of its non-stick surface.
Sep 30th, 1997