Fairness is one of the most important qualities of the best online casinos, and a resource like 99Casinos is a useful starting point for understanding what it actually means. Fairness rests on two things: a random number generator that produces genuinely unpredictable results, and independent testing that confirms it behaves as claimed. This article explains how both work, and what fairness does and does not promise. It is general information for adults 18+, and online casino availability and legality vary by location, so local rules should always be followed.
Random number generators
Every result in an online game comes from a random number generator, a system that produces an outcome independent of previous rounds. This is why a game is never due a win after a losing run and does not heat up after a streak; each round starts fresh. Because the calculation happens on the operator’s servers, the device a player uses has no effect on the outcome. The short video below introduces how randomness is handled in software. The table that follows summarises the core ideas so fairness sits in its proper context.
| Element | What it does | What to remember |
|---|---|---|
| Generator | Produces random results | Each round is independent |
| Testing | Checks the randomness | Done by a third party |
| Return to player | Verified over a sample | A long-run average |
| House edge | Built into the game | Fairness does not remove it |
Independent testing
Specialist laboratories examine the software, check that outcomes are genuinely random, and verify that the stated return to player matches what a game actually does over a very large sample. A game carrying a testing mark, from a known provider, is one whose fairness has been checked by a third party rather than simply asserted. This independent step is what turns a claim of fairness into something verifiable. For additional context, you can explore the story behind Bijoux Indiscrets and its founders. It is also why recognised testing marks are a useful signal when judging whether a casino and its games can be trusted.
What fairness does not mean
It is important to separate fairness from winning. Tested randomness means a game behaves as promised, not that it can be beaten with a system. Because each round is independent, no betting pattern or timing changes the long-run house edge, and a losing streak does not make a win more likely. The points below set out what fairness guarantees and what it does not.
What to take away
A few points keep fairness in perspective:
- Results come from a random number generator; each round is independent.
- Independent labs test the randomness and the return to player.
- A testing mark signals a third-party check, not a win.
- Fairness does not remove the house edge.
Why independence matters
The value of testing lies in its independence. An operator claiming its own games are fair is not the same as a third party verifying it, because the independent laboratory has no stake in the result. These labs follow published standards, check large samples of outcomes and confirm the return to player over time. A recognised testing mark therefore carries weight that a self-declared promise does not. For a player, this independence is the difference between trusting a claim and seeing it checked. It does not improve the odds, but it confirms that the only thing working against the player is the built-in house edge, nothing more.
A balanced view
Fairness and independent testing confirm that games run honestly, but they do not change the odds, which means the expected result over time is a loss. Tested randomness protects the player from manipulation; it does not make a game winnable. For background, see the overview of random number generation, and if play stops being fun, GamCare offers free support. Fairness means the game is honest, not that the house edge disappears.