By default, our Authentication Engine will handle the PSD2 SCA compliance for you.
If your default Dynamic 3DS setting is set to "Prefer no" at the moment, then we will not trigger 3D Secure if the issuing bank does not (yet) enforce 3D Secure or out-of-scope for regulations like PSD2.
Leaving your default setting to "Always" will continue to result in 3DS being attempted on all transactions on that account.
For more information please read our PSD2-SCA compliance guide on how to manage your Dynamic 3DS rules.
For more information contact Support.