Absolutely chinese scam. Wtf.
At FIFA15, if one client buyes their coin, he should auction one player card to gain coins. And then, they auction another "totally same" card and they bought their own card not his. And they say, "you put 2 totally same cards and we bought it. We have the proof on our i-pad. You already receive coins. We are sure."
After that, he say "I have the proof, too. I would request all of records of transaction to EA sports and give it you". And then, they say, "appreciate it"
However, EA sports shouldn't provide any details because those are not in line with their policy. And this is the point Goldah.com knows.
Finally? This is the scam!