Francesco There is no hard limit on incoming transfers, regardless of being verified or not. But the chances are high that you will have to go through verification when a transfer with a somewhat higher amount of money arrives in your account.
If you just want to test bunq with an E-Money account, my personal suggestion would be topping it up with 5 to 10 Euros and doing some small purchases. If you like it, simply verify your identity so you can make full use of all functionality.
