First off, if you've ordered from E-Bay or any other site, you should be aware of where you're at in terms of what auction is still open, whether you won or not and related actions...
Secondly, if you've completed, dropped out, or whatever...you should have enough memory to know how the transaction ended...do you owe or are you clean?
Third...if you've worked these things legitimately, why should "they" need more info/money/whatever from you...AFTER THE FACT?
I'd deep-six the 'e's right off the bat, or turn them over to the appropriate site that handles "phishing" or fraud.
As for me? I get TONS of crap like that every day..."Your bank account will be..." - "You have a transaction pending that needs attention..." All of it is BS, all the time...
Solution?
Until they apply the Death Penalty for attempted fraud, we're going to have to live with this crap. The only thing we can do is avoid the trap and its attached minutia...
Live free and proper, die corrupted. Someone is going to pick your pockets at the funeral home, or at the visitation...
Death, taxes and spam...those are for certain...