Choose one of the reputable casinos on our list and you can be confident that your online transactions will be safe. The online casinos we recommend use secure servers. Any information you give them is encrypted and can't get into the wrong hands. All in all, reputable online casinos are as secure as they could possibly be. Usually, even if you just want to play for free, you need to fill out a registration form in order to get a username and password.
Some casinos also have other payment options such as wire transfers or bank drafts.
The amount of money you specify is your bankroll. After you quit playing, you can keep your money in the account and use it next time. When you win and want to cash out, the casino will either mail you a check, or credit the amount back to your credit card account.