No it's my fault, to check if I copied the address to which I want to send correctly, I put it in google and opened in the mempoolspace website, I did not notice that a completely different address was opened and later copied it from the website again and sent btc to it.
This is why I never ever use an address from my browser history or anything else, and
always verify the address on the original source before sending.
I got answer ,that if account (which was credited )doesn’t belongs to me they can't help.
so ~5000 usd fell "from the sky" to someone.
From the exchange's perspective, that makes sense: the account owner could have received a payment from a third party directly to his exchange account, and said third party could now be trying to get the money back.
Correct me if wrong. But considering the situation OP is in, if the owner of that Address has not logged on to KuCoin for over an year then the Exchange could send out a notification through Email or other methods of communication to the owner. Something like a deadline 12 months for now. If the owner never responds and never logs back to KuCoin either, the Coins be returned to OP.
And a year later the account owner asks the exchange where the money that he received from his client went....
Anyway, if he/she was a conscientious person, he/she would have probably sent it back already.
If I receive 0.07 BTC on one of my Bitcoin addresses, I still can't be sure the on-chain sending address belongs to the guy who sent it. I also can't be sure about the reason for the transaction. I once had to search quite a while to find out why I received a payment, and it was not accidental.