To distinguish a real online casino license from a fake one, always verify the license directly through the official website of the licensing authority, such as the Malta Gaming Authority, UK Gambling Commission, or Curacao eGaming. A legitimate casino will clearly display its license number and regulator information, and you can cross-check it on the regulator's database. Watch for vague licensing claims, poor website quality, lack of clear contact information, or unrealistic promotions, all of which are red flags. When in doubt, stick to well-known, reputable platforms with a proven history of fairness and compliance.