RNG Certification: How Casinos Prove Their Games Are Fair
Every spin, every deal, every roll—how do you know it's random? RNG certification is your guarantee that the house isn't cheating.
What Is RNG Certification?
Random Number Generator certification is verification by independent testing laboratories that a casino's software produces truly random, unpredictable outcomes. Without it, you're trusting the casino to police itself.
The Major Testing Labs
eCOGRA
- London-based, established 2003
- Focus on player protection
- Annual audits required
- Most recognized in European market
iTech Labs
- Australian certification body
- Tests RNG and game logic
- Popular with crypto casinos
- Rigorous mathematical testing
Gaming Laboratories International (GLI)
- Largest independent lab globally
- Tests for 480+ jurisdictions
- ISO 17025 accredited
- Industry gold standard
Other Notable Labs
- Technical Systems Testing (TST)
- BMM Testlabs
- NMI
- Quinel
What Testing Involves
- Source code review — Inspecting the RNG algorithm
- Statistical analysis — Millions of outcomes tested
- Distribution testing — Chi-square, runs tests
- Seed generation — Verifying entropy sources
- Ongoing monitoring — Periodic retesting required
What to Look For
- Certification seal in casino footer
- Click to view actual certificate
- Recent testing date (within 1-2 years)
- Multiple certifications (good sign)
Red Flags
- No certification visible
- Generic "fair play" claims without proof
- Certificates older than 3 years
- Lab you can't verify independently
Crypto Casinos: Provably Fair
Crypto casinos often use "provably fair" systems where you can verify each bet yourself using cryptographic seeds. This is different from traditional RNG certification but equally trustworthy when implemented correctly.
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Only play at certified casinos. Your bankroll deserves verification, not blind trust.