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Missing U.S. Mint ‘Certificate of Authenticity’ Worried Coin Collector. What is It?

United States Mint Certificate of Authenticity documents are given with many coins and sets. (Interior example)A Los Gatos, California coin collector collects United States Mint coin sets. Like many grandfathers, he purchases coins for his grandchildren. Because they are gifts, he also pays particular attention to not only the coins but the packaging around them.

According to abc7, KGO San Francisco, this particular grandfather was worried that the value of one of his sets was greatly depreciated because it lacked the proper Certificate of Authenticity from the U.S. Mint. The Mint inadvertently sent a certificate from different set.

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