I don't have the backend details to be certain, but I do know that even a verified account may later end up getting some extra levels of verification. One possible reason for this is if some sort of issue with the card is flagged after the account is initially opened, funded, and verified. In a case like that, the card's issuing bank itself may get involved with asking for extra security checks. These can be cumbersome and time consuming, but eventually do work out with the extra verification being confirmed or else with verification that the initial deposit was "borrowed" and thus the account was illegally funded. If the first, the funds are then payed out. If the second, AML laws forbid the transfer.