Dear angelamerkel,

We do ask all our customers to send us a letter from the bank in order to verify their accounts. Some banks provide a Standard bank letter indicating that you are the holder of an "X" account for free, in other banks you will have to pay a small fee. But please consider that after verifying your "hitbtc" account you will be able to transfer bigger amounts of the fiat currency.
Regarding your second question about the BTC/EUR volume. We can definitely say that the volume is real and we are 100% sure about it. You can even place some orders and make sure that all of them are filled. In case you don't want to place real money orders, please try our Demo mode trading.

Thank you for choosing our service,
The "hitbtc" team