Editorial explainer — reviewed 11 October 2026.
A random number generator (RNG) supplies values used by many digital gambling games to select outcomes. Testing may assess whether the generator and its use conform to documented technical requirements. The scope varies by game, testing laboratory and market. A general 'RNG certified' badge does not identify which mathematical configuration, software build or operating conditions were examined.
The testing chain
A technical review may inspect design documents and code, analyse output sequences statistically, test the mapping between random values and displayed events, and confirm that deployed settings match the stated paytable. Random output can be sound while an application contains an error in how values become prizes. Test samples are evidence about observed behaviour, not mathematical proof that every future round will succeed.
Version and change control
A result is most meaningful when linked to a software version, report date and testing organisation. Changes to reel mapping, bonus mechanics or random-number handling can invalidate an earlier assessment unless properly reviewed. Operators need controls to prevent unauthorised changes after deployment. A certificate belonging to a game studio should not be copied into a review as evidence about all games on an operator's website.
Three separate questions
Certification asks whether a technical product meets a specified test. Regulatory authorisation asks whether an entity may lawfully supply a particular service in a jurisdiction. Consumer protection asks how complaints, funds and account restrictions are handled. Confusing these questions creates false assurance. ACMA's Australian rules prohibit online casino services offered to local customers; a technical test cannot override that prohibition.
This article addresses RNG certification as a concept. The online-casino technical guide explains the more detailed workflow for fairness testing, while the compliance-audit explainer covers legal oversight rather than game mathematics.
Source: https://www.acma.gov.au/about-interactive-gambling-act