Not received

not quite there mate, the version he was giving away was a standard copy meanwhile the borderlands i got is a game of the year edition, that and i bought it 5 days after winning the giveaway, read the description next time more carefully man

The giveaway he entered and won ended before the 2K sale started. He probably just thought it wasn't a real giveaway and bought it.

I had this conversation before where someone won a game I was giving away but they had a copy of the same game in their inventory. As long as it is not activated, IE as long as they do not have the game in their library, they can still enter to win the game.

So it does not matter if they have the game they won in their inventory or not, the only thing that matters if they have it in their library or not.

Of course, make sure when they get it from you that they activate at least one of those. ( IE if it does not pop up in their library after a while once they received it. Then you can contact support about it. )

Screen soft of your purchase history should be sufficient in my opinion...

indeed

But if he bought it and stored in his inventory, when activated it'll show "Gift/Guest Pass" anyway. In this case he'd have to show the Store Gift Transactions as well. Or the purchase receipt.

^^^This.