How do Ontario online casinos prevent their games from being manipulated or producing unfair results?

Game fairness in Ontario's regulated online casino market is enforced at three distinct levels: the software itself, the testing labs that certify it, and the regulator that oversees the whole chain. Here's how each layer works.

The RNG: no hidden code, no back doors

Every spin, card deal, or dice roll at a regulated Ontario site is driven by a Random Number Generator (RNG). The game's control program must be structured so that "the RNG result, skill-based player input, or a combination thereof must be the only result used to determine the Game outcome." That's not a guideline — it's a hard technical requirement written into the AGCO's Minimum Technical Standards. Each call to the RNG must use its output without modification, and there must be no redundant code or "Easter egg" that can affect proper operation. In plain terms: the game cannot be secretly weighted, and no one can flip a hidden switch to change results.

Gaming devices must also be able to detect statistical evidence that an RNG is not performing as expected and flag it to the operator for prompt action — so drift or malfunction doesn't quietly go unnoticed.

Independent testing labs certify every game before it goes live

Games don't get deployed simply because an operator says they're fine. The AGCO registers independent testing labs (ITLs) that test and certify that igaming technology meets the required Registrar's Standards for Internet Gaming. The components that require ITL certification include games, random number generators, and components of igaming systems that accept, process, determine the outcome of, display, and log details about player bets and wagers.

All games to be offered in Ontario must, prior to deployment, be certified by an ITL registered by the AGCO or approved by the Registrar, and be provided by AGCO-registered suppliers. An operator's CEO and Chief Compliance Officer must sign a letter to the AGCO confirming this — it's a named accountability, not a checkbox on a form.

Source code reviews are part of this process too. New control programs must undergo an independent review of the submitted source code, and the results of this review must be included with the submission of the new platform. Modifications to gaming device control programs that impact on one or more of those topics may require an independent source code review on the modifications, assessed by the AGCO on a case-by-case basis.

Ongoing monitoring — not just a one-time sign-off

Certification before launch is only part of the picture. Monitoring and testing must be performed throughout the life of the gaming system and gaming supplies to ensure they are operating as approved. Operators must monitor the payback of their live games to detect any behaviour that may indicate faulty performance. If something looks wrong, the Registrar must be immediately notified where there is any problem with the integrity or security of the gaming system.

Game outcomes must be recoverable where technically possible so player bets can be settled appropriately, and in any case of a game or system fault, the operator must have clearly defined policies for treating the player fairly when resolving transactions.

The AGCO also has teeth. It monitors operators, suppliers, and digital game offerings for compliance with regulatory obligations, and where compliance concerns are identified, it can bring operators back into compliance through progressive sanctions — warnings, suspensions, monetary penalties, and in the most serious cases, revocations.

What players can check for themselves

This is all regulated-market infrastructure that runs in the background, but there's a quick check you can do. Look for the iGaming Ontario logo wherever you play as a sign that you're playing on a site that is being conducted and managed by iGaming Ontario, offers player protections, and meets Ontario's high standards for game integrity and responsible gambling. Regulated sites also display the BetGuard logo — BetGuard being Ontario's centralized self-exclusion service. Seeing both logos together is your clearest signal that the site is properly registered and operating under these rules. The full list of registered operators is available directly through the iGaming Ontario registry.

Ontario's legal gambling age is 19+. If you ever have a concern about a specific game's fairness on a registered site, the AGCO addresses regulatory complaints and inquiries, including those related to game integrity and fairness. And if gambling is ever causing stress rather than enjoyment, ConnexOntario (1-866-531-2600) is available around the clock.