If GateKeeper:2.0 fraud screening is enabled on your account, each transaction will be allocated a score based on its risk profile.
You can view this information for any transaction by viewing the order, then clicking the Show Payment Details button.
If a transaction is not deemed to be a fraud risk, you will be able to issue an invoice for it immediately.
This is the case when the risk status is indicated as ACCEPTED.
If, however, a transaction requires a risk review, this will be indicated as REVIEW_REQUIRED.
A review of the transaction must then occur in Gatekeeper, where more information is available to help the merchant decide whether to accept or reject it.
If the merchant attempts to invoice the transaction before this has occurred, an error will be displayed and no invoice will be created.
For transactions requiring review, it will only be possible to invoice and complete the transaction once the transaction has been approved in Gatekeeper.
If a transaction is rejected in Gatekeeper, this will update the decision information in Magento for the order.
Refer to the Gatekeeper user manual for more information.