Because you haven't checked where you're sending. I haven't used Poloniex for a long time but when you're about to deposit, is there any warning or message that to check the address where you're sending before you make a transaction?
In the past, that's what I've read when somebody have the same experience as you, he'd explained a lot and his mistake and then the exchange told him that they can no longer retrieve the wrongly sent coins back to him.
Hi, Thank you for your reply..
Bitcoin transfered from binance exchange using binance " API " .. when you use API at this time you dont got any error message that this wallet adress is incorrect or something else...
Thanks..
There's no other choice, since the funds have already been released outside by Binance, they are no longer accountable to it.
Just as I've said about the past experience of having the same problem, you're lucky if poloniex will help you to retrieve back your fund.