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When the merchant builds the next order, it is possible to redirect to the IPS Assist payment page to pay with the earlier saved card. In this case, the merchant must send order data with a unique customer number, i.e. in addition to the parameters of. of the document «Setting up the technical interaction with IPS Assist» authorized request parameters, it is necessary to transfer the CustomerNumber. All actions related to payment by a saved card are performed on the Assist side.
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