Every slot and table game offered by a licensed Canadian casino carries a published return to player, the share of wagers a game pays back over the long run. The number is not the operator’s own estimate: it comes from an independent testing laboratory that certifies the game before it can be offered.

Who does the testing

Regulators approve a short list of laboratories that examine the random number generator, the pay table and the game logic. In Ontario the Alcohol and Gaming Commission publishes its list of registered test labs, and a game needs a certificate from one of them for each version released. Provincial lottery corporations use the same laboratories for the games on their own platforms.

What the certificate covers

The lab runs the game through millions of simulated rounds and confirms that the observed payout matches the declared figure within a narrow tolerance. It also checks that outcomes cannot be predicted from previous results and that bonus features pay exactly as the rules describe. Any change to the game, even a graphical update, requires a new review.

Ongoing checks

Certification is not a one-time event. Operators report actual payout figures to the regulator, and a game that drifts from its certified return is pulled until the cause is found. Players can ask for the certificate reference of any game through the operator’s support.

A published return applies over a very large number of rounds; it says nothing about how a single session will go, which is why regulators also require clear information about volatility.