In every country have different step to withdraw your assets to be cash money, I recommended to you to put your place or country on your thread, so that will make you'll get the best answer for your question.
If in my country, Indonesia, I'm using Indodax's account to withdraw my assets, there I should complete my ID and put my card's numbers, after that I'm withdraw my assets into IDR and about 1 hour the money received to my ATM card. So easy and safe because that using Google authenticator and phone number verification when we want to withdraw my assets. I'm really happy with the service which really fast and friendly.