already wrote about this two weeks ago.
the client wil handle it this way:
1. check if address is within own address book -> green
2. if account exist within blockchain -> yellow
3. don't exist within blockchain -> red
simple visual control.
Thx. But what about after clicking "Send"? As I recall wrong sends happened after correct address was set.
This is why I addressed my request to jean-luc also. We need to PREVENT darkNXT for all except the most motivated API users. darkNXT has no real world benefit as far as I can think of, in fact it could attract NXT miners who will look at 64 bits and their petahash ASICS and start drooling when NXT gets to $1
James