Gambling terms, explained straight

Online Gambling & Industry

GLI-33 certification

GLI-33 certification is independent verification that an event wagering system meets the technical requirements of the GLI-33 standard for sports and event betting.

Standard version
Version 1.1, revised May 14, 201912
Scope
Systems for sports wagering and other regulator-approved event bets26
Process
Suppliers submit documentation and access to a production-equivalent test environment; a certificate of compliance is issued if testing passes1

Key points

  • Covers event wagering systems for sports, competitions, and other approved events.26
  • Adopted by some state and tribal regulators as a technical requirement.43
  • Distinct from GLI-19 certification, which applies to interactive gaming systems.35

Where this term is used

Not the same as

  • Gli certification diamond — a broader certification mark for products meeting any GLI standard, not limited to event wagering
  • Gli 19 certification — certification for interactive gaming systems, whereas GLI-33 covers event wagering systems
Online GLI certification Overview of certification against any Gaming Laboratories International standard. Online iGaming Explains Gaming Laboratories International and its role in testing and certification. Online Ecogra certification Another independent certification for online gambling software and operators. Online Gli-11 Technical standard for slot machines and gaming devices. Online KYC meaning Know Your Customer processes used in gambling to verify player identity. Online MGA licence An MGA licence is a permit issued by the Malta Gaming Authority

Sources

  1. GLI-33 STANDARDS FOR EVENT WAGERING SYSTEMS gaminglabs.com Defines GLI-33 certification and describes the testing process.
  2. GLI-33 NORMAS PARA SISTEMAS DE APOSTAS DE EVENTO gaminglabs.com Specifies the scope of GLI-33 for sports and event wagering.
  3. [PDF] iGAMING - Gaming Laboratories International gaminglabs.com Distinguishes GLI-33 from GLI-19 and notes adoption by regulators.
  4. GLI Publicly Releases “GLI-33 Event Wagering” Technical ... gaminglabs.com States that GLI-33 has been adopted by state and tribal regulators.
  5. 互動娛樂的數碼世界導航 gaminglabs.com Further distinguishes GLI-33 from GLI-19.
  6. GLI to Showcase 30 Years of iGaming & Sports Wagering Experience - GLI gaminglabs.com Confirms the scope includes sports and other approved events.

Sources are drawn from regulators, universities and published research, and each one is labelled with what it actually is — a preprint is not called a paper. Bookmaker and affiliate pages are never cited here, because a page that sells betting is not a neutral authority on it.

Written and maintained by Ellis Warrender, writer and maintainer.

Last updated 28 July 2026. Spotted an error? Tell me and it gets fixed and logged on the corrections page.