Pay Purchase Orders With Corporate Card Instead Of Procurement Card

Does anyone use a corporate card to pay for purchase orders instead of a procurement card? 

We have a card issued by American Express that can be used to pay for purchase orders from a limited number of vendors.  We are in the initial stages of trying to determine what can be done in PeopleSoft to automate processing purchase orders paid by corporate card so that the transactions flow all the way through to Payables.

A file has to be created to send to Amex containing the POs that are authorized to be paid by card.  Is there a field on the PO that indicates payment will be made by credit card?  I saw a credit card field on PO Header table, but it was not visible on the PO page online.