There's other schemes going on, this kind of money transfer isn't much of a danger ... what happens in some cases is that you get a money transfer, either for the amount expected, or even more, then they get back to you, back out of the deal and ask you to transfer the money back, giving you a bank account # for the transfer - when in effect they used a stolen bank account to transfer the money from, laundering the money on the way ... and you get into trouble because you helped laundering it, plus you have to pay the money back to the original account ... of course, the other account transfer cannot be stopped/revoked again, so you're the idiot in the end (just as in the beginning
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