Actually before i could withdraw from bittrex, i had to verify my email and my phone number....but that's it, at least for basic level.
Lucky for you, pal. Because for me, I made a second bittrex account so I can hold the other altcoins I bought that so will not touch it for few years that I'm expecting to boom but unfortunately these bittrex admin and staffs are using this stupid excuse to steal people's money.