You can use Radar rules to trigger 3D Secure authentication for payments made using Stripe Billing, including recurring subscriptions and invoices. This feature is disabled by default for charges where 3D Secure is available but not required, but you can enable it in Radar if your Stripe integration supports 3D Secure via Stripe Checkout or our Payment Intents or Setup Intents APIs.
When this rule is enabled, it will only apply to payments made in live mode.
3D Secure authentication for Strong Customer Authentication (SCA) will always be triggered, regardless of whether or not you have this rule enabled.