Certifications and slot fairness
Certifications and slot fairness
Slot machines at licensed casinos are tested by independent laboratories that verify the random number generator produces results matching the parameters declared by the provider. These tests cover win distribution, measured RTP, and absence of bias. The main recognised certification bodies are eCOGRA, iTech Labs, BMM Testlabs, and Gaming Laboratories International.
Why certifications exist
Online gaming regulators require operators to use only game software whose fairness has been verified by an independent third party. The goal is to confirm that the RTP and RNG behaviour match what the provider declares, and that players are not disadvantaged by an undisclosed bias.
The main accredited laboratories
Several organisations conduct these audits internationally. eCOGRA is one of the best known in the online gaming sector. iTech Labs operates in Australia and across several Asian and European jurisdictions. Gaming Laboratories International (GLI) is accredited by a large number of regulators worldwide. BMM Testlabs serves regulated markets in North America, Europe and Asia.
What the tests check
Laboratories run statistical test suites on the RNG engine to verify that results are uniformly distributed and unpredictable. They also verify that the RTP measured across a large number of spins falls within the declared range, and that bonus features function according to documented rules.
The certification logo
Some operators and providers display a certified laboratory logo within their games or on their website. This logo can generally be verified directly on the laboratory’s own website. A logo alone is not sufficient; it is also worth checking that the operator’s licence is active with the relevant regulatory authority.
FAQ
What does an eCOGRA certification actually mean?
It means the game was audited by that independent laboratory and its statistical results conform to the declared parameters, including RTP and win distribution.
Can providers modify a game after certification?
Any significant software change requires a new certification. Regulators require that the certified version is the one deployed in production.