This account has been tagged and we will need to see a signed message from the account holder from this BTC address: RQCPNWn4fKZGjBsA7RnbnusYGdLjBVk85k
before the account has the red tags removed.
Well, I also think the account is hacked but asking a signed message from altcoins is not valid. Maybe he can prove it somehow and them we fulfill his request, by the way anyone giving loans to such accounts should keep in mind that they can recovered later with the admin involvement. So you should always take proper details and proofs.
It does not matter what is wrong. Something is wrong! Doing trades with this user is highly not recommended!
If the account has been hacked, let the real owner clean it up with admin.