# Frictionless flow for charges created using 3D Secure 2 (3DS2)

[3D Secure 2 (3DS2)](https://stripe.com/guides/3d-secure-2), the newest iteration of [3D Secure](https://stripe.com/docs/payments/3d-secure#3d-secure-card-payments), introduces a frictionless flow that allows customers to complete the 3D Secure authentication process without redirecting them from the checkout flow if the transaction is deemed eligible by their bank.
## Additional Information
* Transaction eligibility for frictionless flow is dependent on the card issuer and is assessed on a per-transaction basis.
* Transactions that are not eligible for the frictionless flow and require authentication will be presented with a modal to complete the authentication process.