This depends entirely on the online casino and the game provider it has partnered with. You can withdraw amounts as much as or equal to the maximum withdrawal limit without any hassles. The online casino may just ask you to undergo a verification procedure, as part of which you have to submit documents that prove your age, identity, country of residence, and ownership of credit/debit card or eWallet account.
However, the case is different for progressive jackpot wins. Some casinos will payout the entire amount in one go. Some casinos may take a longer time to pay out progressive wins. And some casinos pay out progressive jackpot wins in increments equal to their maximum withdrawal limit