If you have had a winning session playing at any online casino site bingo site or even a licensed sportsbook then you will want to withdraw some or all of those winnings quickly and without any fuss or hassle, and to do that you simply visit that casinos banking interface and request a withdrawal of your winnings.
However, some casino sites will, once you have requested a withdrawal, leave your withdrawal sat in a pending state of a few hours or even several days, and in that time you can, if you want to, reverse your withdrawal and get your winnings placed back into your casino account to enable you to carry on gambling.
However, that is often going to be the sure fire way of losing back everything you won and as such if any casino site you play at has a pending state for withdrawals, then once you have made your withdrawal request you should contact the customer support team and ask for the withdrawal to be flushed.
When you ask for a withdrawal to be flushed via the customer support service at any casino site if that site offers that service, the support agent you are talking to will be able to remove your withdrawal from its pending state and send it to the cashiers department to be processed as quickly as is possible. Just be aware that not all casino sites have pending states for withdrawals and not all of those that do will allow you to flush your withdrawals!