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<p>[QUOTE=&quot;Spider, post: 391750, member: 2596&quot;]well, ohh you want a knowledgeable person <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /></p><p>-----------------------------------------</p><p>just kidding</p><p>I will give you a quick run-down</p><p>Yes they can be tampered with.</p><p>Coins have been discovered to be counterfeit and yet they are in PCGS holders. Kinda scary, but for now only highly valuable coins have been discovered. However, as for the average person, slabs are tamper resistant. Once the slab has been opened (NGC, PCGS, ICG, ANACS) it cannot be closed back together. IF you need further clarification, feel free to ask.[/QUOTE]</p><p><br /></p>

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