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					Originally Posted by gregndodgers  That’s a good point. Concealment of a material fact can also be fraud, but I believe it’s fraud only when there is a duty to disclose. Typically, real estate transactions have a duty to disclose material facts. I’m not sure whether there is a duty to disclose when selling personal property like sports cards. | 
	
 If I sell you a car, and know it's defective but don't tell you, of course I had a duty to disclose that.  I don't see why it's any different with any other good, if the concealed fact (here alteration) is material to the transaction.