Michael What you are asking is already possible, like mentioned above.
But it did make me think that it would be very cool if you could get a push notification, optionally, when doing a withdrawal, even within your limit. You would have to confirm first before the money is actually withdrawn.
This way you can have high limits without anyone being able to withdraw with a stolen/lost card if they donβt have your phone.
Not sure if itβs technically possible because a bank might need to respond within a maximum time.