If a casino is caught cheating, individuals who have evidence of being cheated may have the right to file a claim for their losses. However, the specific legal recourse available to each individual may depend on the laws and regulations of the jurisdiction where the casino is located.
In the U.S. theoretically you can sue any one for anything. Whether or not you have a valid case and whether or not you can get an attorney or court to take the case is a different matter. If you have evidence that the casino did something fraudulent, you may have a case.
