Most are located in Costa Rica, Australia, the Caribbean, and Europe, where online gambling licenses are available. For more information on the legal issues concerning online gambling, check with your local authorities. Generally speaking, yes. Legitimate casinos don't need to operate crooked games to make a profit. There's enough profit built-in with the house edge and player mistakes.
Many casinos advertise that their games are tested for fairness.
Some are even audited by Big 6 Accounting Firms like PriceWaterhouseCoopers. There are a few dishonest casinos out there. The most common complaint we hear from players is that some online casinos are slow to pay out winnings. In a few cases, casinos have not paid out at all. We recommend that you check with third party watchdog groups like the OSGA or the Internet Gaming Commission before you make your initial deposit.