When Reserve Bank inventories of fit cash run down to certain levels because of the destruction of unfit notes, the Reserve banks order new notes from the Bureau of Engraving and Printing, a division of the Treasury Department.

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Geithner began working with the Treasury Department in 1988 in the International Affairs division.

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The Secret Service was created as a division of the U.S. Treasury on July 5, 1865, to suppress counterfeit currency.

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