I have seen many duplicators on FIFA12 UT, when checking though the auctions if you see some one who has the same card several times they are not very lucky just DUPLICATORS ( i hope EA patch this very soon), i had not played fifa UT since 09 and was shocked to see so many duplicators on fifa 12. I know the auction displays the sellers UT name but not there xbox live gamertags, so i cant file a complaint or submit a bad player review,or report them to EA, so i have taken to checking the top 100 trading leaderboard and seen most of the top 100 are duplicators (you can see they anit played any games or very few) you can click the right stick and find out the gamertag on the leaderboard and file a complaint. I would never leave my account details for someone to do this, (there is a website where you can leave your details where some one would accsess your account using the web app fifa UT and then proceed to duplicate your top players).
ps : Why did xbox.com change there forum set up it was alot easier to navagate before and takes forever to find what you want now!!