Once you are ready to screen live transactions using live filters, you must specify whether to deploy in Observe Mode or Active Mode.
All live transactions, whether in Observe or Active Mode, are billed the per-transaction Fraud Protection Services fee.
Observe mode allows you to see how filters will impact live transactions without actually rejecting them or holding them for review.
In Observe mode, every transaction is screened by the filters and then submitted for processing in the normal way. The transactions are not actually acted upon by the triggered filters. Instead, transactions are marked with the action that the filter would have taken had the account been in Active Mode.
Once you deploy in Active Mode, the filters that you have turned on immediately begin screening transactions and taking action when appropriate. Live transactions are accepted, rejected, or held for review as specified in the filter.