Are the virtual card details stored in Oracle Cloud ERP?

Oracle Cloud ERP doesn't store any virtual card details. Your card issuer generates the virtual card numbers, or Mastercard generates them on your issuer's behalf, after receiving your payment instruction. The virtual card numbers are then sent to the supplier to process the payment. Oracle Cloud ERP stores a transaction identifier which it passes to the issuer or Mastercard. When the issuer or Mastercard passes messages back acknowledging the payment has been issued/cleared, they share the transaction identifier with Oracle Cloud ERP.