No, can they can and are often be faked or carded. So Amazon is often removing Gift Money balance from your account and often also closes Amazon account, where faked or carded gift vouchers are credited to.
Hope this helps.
Steve
Doge Road Crew
As there is no way to tell if the Amazon GC is carded or not, don't take the risk.
They are also very easy to SE, so I highly don't recommend it.