Credit Card scam beware

I had a friend of mine call me telling me about how he got scammed out of $12,000. Someone paid his credit cards down $12,000 and then requested the money back. He believes that the people were out of Russia but they were using a Florida address. He refused and contacted Citibank about returning the funds that were deposited in his Bank of America Account. He made the exchange, did the right thing and got nailed. Bank of America is now coming after him for the $12,000. Very odd but true. If this happens to you, you might want to hang on to the money even though it was stolen from somewhere else. In this case doing the right thing cost my friend $12,000.