By default, what does Radar do for charges that hit a rule and go into the "review" queue?

Radar, Stripe's fraud detection tool, is designed to analyze transactions based on a set of predefined rules. When a charge hits a rule and enters the "review" queue, the default action taken by Radar is to allow the charge to proceed. This means that, while the charge is under review and potentially flagged for further scrutiny, it will still be processed without interruption. This automated approach allows merchants to maintain their transaction flow while still having the benefit of monitoring for potentially fraudulent activity.

Other options may suggest various actions like holding the charge or requiring additional verification, but in the default setting for Radar's review process, the priority is on minimizing disruptions to the merchant's operations. Consequently, charges in the review queue do not automatically decline but continue through the payment process while being monitored.