Suspending Transactions to Perform Additional Check

To make credit card payments more safe, you can suspend transactions on one of the following conditions:

Payment processing is set to manual approval globally.
Fraud screening plug-ins had found at least one suspicious attribute in the information provided by a customer. You can enable this security option in the Billing Manager - Setup - Payments Processing.
Customer's address and/or tax zone requires manual approval. This security option can be enabled in the Billing Manager - Settings - Taxation - General Settings.