Setting the default threshold score for anti-fraud filters allows avoiding situations when a filter score appears to be set to zero, so a filter moves an order being checked into the Documents for Approval queue if an order fraud score was increased even by a single point.
The default score for rules used in anti-fraud filters pre-fills the corresponding field in a rule configuration form, on rule creation, so you can leave the default score or adjust it.
The Fraud screening Setup also allows enabling or disabling the anti-fraud screening in general.
To set the default threshold score for anti-fraud filters and default score for fraud checking rules: