U.S. Patent 5,704,651
The "MetallicSafe"™ process is one that totally protects the product from scanning or photocopying. This patented feature works on the basis that a highly reflective metallic image, number or message is hot stamped over the top of a printed scrambled background with similar graphics as the metallic message. When the product is scanned, photo or color copied, the highly reflective metallic image turns predominantly black, causing the image or message to disappear into the background.
Verification is simple and very obvious. Tip the MetallicSafe™ area towards light and if you can't verify the message or number, then it's a counterfeit.