[BobAliceInATree]

No number of confirmation dialogs going to help anyone in determining that their 27+ digit address is mistyped.

[johnisgood]

Copy paste, and triple check the first and last 4 characters.

[pants2]

Not good enough, scammers will make copycat look-alike addresses that have the same first ~7 and last ~7 characters.

[johnisgood]

What does this mean in practice though? If you need to be certain, make sure you copy the right address.

[johtso]

What about something like VisualHostKey but for the bitcoin address?

[johnisgood]

I doubt that would help much. People should clear their clipboard, and copy & paste, then double check the whole thing, or at least the first and last few characters.

[nullc]

Bad advice scammers/malware have huge tables of addresses they've generated that agree in the first N and last N characters. If a user is going to compare a subset they should make an effort to make it be an unpredictable subset.

[charcircuit]

Bad actors can easily pregenerate adresses that mach those ahead of time.