Although there is a few exchanges where you can withdraw from the deposit address itself but you can't withdraw from deposit address from all exchanges. Anyway, I am sure the exchange will use the BTC or atleast they move to one of their wallet(cold and/or hot). Which exchange are you using? This is really suspicious and looks like you're buying trust.
Can you sign a message from an old address associated with your account?
Would you be willing to offer your account as collateral?
im sorry but i dont want to use my account now as collateral..
Could you do if the amount is raised?
This user changed his/her password recently.
I'd personally ask for the user to sign a message, as giving loans without collaterals is never a good idea.
the reason this account password was changed because this was used as a collateral 1 week ago
Confirming what is said above. I was the lender.
-MZ