No, it's not a proof. Again, read this:
https://bitcointalk.org/index.php?topic=260073.0He is tried to scam me his code is deactivated for fraud i dont used it i dont want to waste my steam acc
You both are really bad at providing information. I'm just removing the temp negative feedback.
I may add it again if enough information is posted.
Update: I've received more information from xBoxLive (showing he bought a code to re-sell it to WorknLearn and sent it to him)
and none from WorknLearn so I've re-added the negative.