It depends on how well the fraud is executed, how long time has been passed since the fraud happened and also on the amounts and people/organisations involved.

Technically kalzumeus might be right, however practically it almost always makes sense to think that wire transfer is final, and treat it that way. If a con man tricks you into wiring funds to a wrong address, it is quite likely gone. However with credit card payments you can be more relaxed, and so on.