Which API parameter allows automatic addition of previously fraudulent cards?

Which API parameter allows automatic addition of previously fraudulent cards?

• A. status=fraud
• B. reason=fraudulent
• C. source=fraud
• D. action=fraudulent

Answer: (B)

Radar uses a reason field to describe why a card or charge was flagged, and setting that reason to fraudulent signals Stripe to apply automatic protections, such as adding the card to a blacklist for future transactions. The reason=fraudulent option explicitly communicates the cause of the flag, triggering that automatic handling. Other parameters don’t express the cause of fraud in a way that Radar uses for automatic action: status reflects the current state of an object, not the reason for fraud; source identifies the data source (like a card or token), not the fraud reason; and action isn’t a valid parameter for this purpose.

Radar uses a reason field to describe why a card or charge was flagged, and setting that reason to fraudulent signals Stripe to apply automatic protections, such as adding the card to a blacklist for future transactions. The reason=fraudulent option explicitly communicates the cause of the flag, triggering that automatic handling.

Other parameters don’t express the cause of fraud in a way that Radar uses for automatic action: status reflects the current state of an object, not the reason for fraud; source identifies the data source (like a card or token), not the fraud reason; and action isn’t a valid parameter for this purpose.