How to check the honesty of the slot: tests and certification
The honesty of an online slot is determined by how its results match the declared return to player (RTP) percentage and whether they are provided by a completely random random number generator (RNG). To verify this, games are tested by independent laboratories, and casinos are required to publish or provide the player with supporting certificates.
1. What "honest slot" means
Fair slot is a game where:
- Results are generated randomly using a certified RNG.
- RTP corresponds to the value declared by the provider.
- The mathematical model does not change depending on the player, session time or bet size.
2. Who tests and certifies
Slot integrity testing is performed by independent laboratories that test both the program code and the actual behavior of the game:
- eCOGRA (eCommerce Online Gaming Regulation and Assurance) is a British laboratory that checks RTP, RNG and compliance with international standards.
- iTech Labs is an Australian company that tests games for major providers and operators.
- GLI (Gaming Laboratories International) is an international organization with accreditation in dozens of jurisdictions.
- BMM Testlabs is one of the oldest testing companies in the gambling industry.
3. What tests the slots pass
1. RNG test - checking the random number generator for impartiality. The results must be statistically uniform and lack predictability.
2. RTP check - long-term simulation of millions of spins to compare the actual return percentage with the declared one.
3. Volatility analysis - Match actual win rates and prize distributions to the reported model.
4. Functional tests - checking the performance of bonus functions, freespins, multipliers and other mechanics.
4. Where to look for certificates
On the casino website - in the basement (footer), eCOGRA, iTech Labs or GLI logos are often placed with a link to the certificate.
On the provider's website, many developers (NetEnt, Microgaming, Pragmatic Play) publish certificates on their domain.
On the auditor's website, eCOGRA, GLI and iTech Labs have sections with a search by casino or game name.
In the documents of the regulator - in jurisdictions with strict control (MGA, UKGC) certificates can be attached to the operator's license.
5. To verify that a certificate is real
The certificate must contain the date of issue and the name of the game.
RTP and tested RNG information must be specified.
There should be a direct link to the auditor's page (not just the logo picture).
The document must match the data published on the website of an independent laboratory.
6. Red flags pointing to questionable slot
No mention of testing.
Audit company logos without an active link.
The difference between the declared RTP on the provider's website and the actual value in the casino.
Complaints from players about unstable performance of bonus functions or suspicious series of drops.
Conclusion:
- Slot integrity testing is not just a matter of trust in the casino, but a specific procedure with confirmation from independent auditors. Any player can independently find a certificate and make sure that the slot works according to honest algorithms and meets industry standards.
