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From: mgrant@MIMSY.UMD.EDU (Michael Grant)
Newsgroups: mod.telecom
Subject: Re: British Phone Phraud
Message-ID: <8612310108.AA02184@ucbvax.Berkeley.EDU>
Date: Wed, 24-Dec-86 13:07:24 EST
Article-I.D.: ucbvax.8612310108.AA02184
Posted: Wed Dec 24 13:07:24 1986
Date-Received: Wed, 31-Dec-86 00:45:33 EST
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I have seen one of these cards.  The card is the size of a credit
card, made of thin metal.  A number like 5, 10, 20 units is printed on
the front.  Also, on the front in a band that is placed about where
the magnetic strip on a credit card is, if you look closly, you can
see tiny squares protruding from the surface, one square for each unit
that the card is worth.  The hack is probebly something like
scratching one of these squares.  They do not appear to be holograms.
They remind me of the same sort of material that is used in book
stores to stop book theft.

-Mike