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BtoB

Citigroup, American Express sign e-payment pacts with SAP AG

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New York--Financial companies are extending their blitz into the exchange e-payment space. In separate deals, Citigroup and American Express Co. signed on with SAP AG, Walldorf, Germany, to build the back-end payment systems behind SAP's b-to-b exchanges. American Express will link in payment systems that use its corporate cards.
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