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<p>[QUOTE=&quot;Rhino89, post: 1086317, member: 21773&quot;]Before we move on to old bills let me highlight a security feature that is rarely discussed:</p><p>&nbsp;</p><p>All of the new US currency ($5, $10, $20, $50) have a &quot;Eurion constellation&quot; on them. It is a mathematical arrangement of objects that creates a design that is recognized by color copiers, and can be found in the pool of tiny yellow numbers on the $5 (the tiny &quot;05&quot; that are repeated a bunch of times and arranged in what appears as a random arrangement of numbers).</p><p>&nbsp;</p><p>As far as why some notes don&#039;t scan, I don&#039;t know. But the constellation is why color copiers (the new ones at least) will prevent you from copying the notes.</p><p>&nbsp;</p><p><a href="http://en.wikipedia.org/wiki/EURion_constellation" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/EURion_constellation" rel="nofollow">http://en.wikipedia.org/wiki/EURion_constellation</a></p><p>&nbsp;</p><p>It&#039;s not an &quot;official&quot; security feature, I mean I don&#039;t know if the US government decided to make that arrangement with this purpose in mind, but it is a security feature that in one way tries to discourage counterfeiting.[/QUOTE]</p><p><br /></p>

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