| 摘要 |
A technique for preventing unauthorized access to a hidden code on a prepaid telephone card. A technique for preventing an undetected access to a hidden number or code on a lottery ticket, prepaid telephone card, game piece, or other type of item. A structure is provided to prevent the embezzlement and viewing of the hidden number on a prepaid card by attaching an opaque film label over the hidden number to conceal the hidden number, attaching a holographic image over the film label, and attaching a transparent film over the holographic image. The transparent film, holographic image, and film label must be removed in order to view the hidden code. When the transparent film, holographic image, and film label are removed, certain marks are left on the card which clearly demonstrate that the hidden number has been accessed.
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