Some apps do not allow you to exit out and open another app while doing a payment, and sometimes it is more convenient to just accept a notification on your lockscreen than having to unlock your phone, open an app and perform an action. I have done some designs of what the process for performing a 3D Secure transaction could look like with 3D touch functionality. I am aware, however, that this process conflicts with how Monzo currently handles 3D secure (you must enter your card PIN), so maybe we could replace entering the card PIN with Touch ID instead?
