I can't think of a way to "undo" in this scenario without some settlement pattern. You can do whatever you want, but it doesn't "commit" until some settlement clears. In this case, still leading back to some kind of "Are you sure[...]" question, except to review in batch, like someone reviewing a bank statement.
Some people like reviewing in batch, some progressively, depending upon their individual perception of the cognitive load involved for them.
Tough to economically prevent spoofing though, when you start dropping aspects of authentication, integrity and non-repudiation. I suspect we can't substantially move that "Are you sure[...]" question's boundary until wearables become implants like a neural lace-grade implant.
(Congratulations on having been the only respondent here to actually have said anything worthwhile. Too late to be able to edit in another addendum to my comment, though.)
I can't think of a way to "undo" in this scenario without some settlement pattern. You can do whatever you want, but it doesn't "commit" until some settlement clears. In this case, still leading back to some kind of "Are you sure[...]" question, except to review in batch, like someone reviewing a bank statement.
Some people like reviewing in batch, some progressively, depending upon their individual perception of the cognitive load involved for them.
Tough to economically prevent spoofing though, when you start dropping aspects of authentication, integrity and non-repudiation. I suspect we can't substantially move that "Are you sure[...]" question's boundary until wearables become implants like a neural lace-grade implant.