Its Over !

Yeah, I mean seriously come on dude check your email wtf is wrong with you

Ill-intentioned users might try to impersonate the winner and add you on Steam to claim the gift.

He means people may now impersonate the winners screenname and tell you some bs story about not being able to access that email or that it's old and you should totally send it to them now elsewhere.

There is a reply button next to every post. If you use it, it will put your reply directly under theirs and notify them that you've responded. Also, you can use this system as a means of contacting your winner. If you can find a giveaway, topic, or post they've made, reply to it and they'll get a notification. You'd probably be best off closing this topic and removing the name of the winner because, as people have mentioned, it will only lead to unscrupulous individuals trying to scam a game off you.