Enterign GA for already owned game

If he pissed you off, just blacklist him, but maybe he entered it before winning the game? Anyways he should care about removing his entry, he can do it later too if he cares, but you should not report him for that, if a guy who owns the game wins it, you can reroll.

Is it the Kane & Linch collection?'cause that one keeps appearing and i already own it!Maybe he thought he didn't own it yet :P

Most likely he entered them at the same time/day.

I don't see a problem there, unless he wins.
And then it's his problem, not yours.

I'm kinda surprised they don't have a system in place that if you win a game you are automatically removed from other GA for the same title. I guess there is always the chance that the person doing the GA won't give the game, but you do have the chance to win multiple copies especially for some of the games that are popular GA.

Meh, but do have an interesting suggestion where to place that potato though......

Meh (potato)

Well, not likely but it could have been just a honest mistake. I have sometimes entered a ga for a game five minutes after I bought it, just out of reflex (and like a minute before facepalming and removing my entry).

Might have been using a script to enter giveaways of certain games and not updated it yet.

I don't know if this is the case but some games appear as not owned. Maybe he didn't even looked what game he's entering.

Some people automatically enter giveaways with a script, and have no idea what it's trying to win for them. It's not against the rules, other than the "rule" of being a decent human being, perhaps. :)

I suggest checking every time a giveaway ends that the winner doesn't already own the game. Before you send them the gift/key/whatever via email, take a minute to look over their Steam profile. You may also want to take a few more minutes to check they've redeemed all their previous wins... :)

You should stalk him. Maybe one day he will win two of the same game and you can finally get him suspended!