RTP percentages get thrown around on casino pages like they are carved in stone, but the number you see is only as trustworthy as the lab that signed off on it. 1xBet, founded in 2017 and operated by 1xCorp N.V. under a Curaçao eGaming licence (OGL/2024/1262/0493), publishes RTP figures across its slots and table games. The question a skeptical player should ask is simple: who checked those numbers, and against what data? If the answer is eCOGRA or GLI, you are looking at independently verified return-to-player. If it is nobody, you are reading a theoretical figure that may not match what the server actually pays out.
What eCOGRA and GLI certification actually proves
eCOGRA (the eCommerce and Online Gaming Regulation and Assurance body) and GLI (Gaming Laboratories International) are the two names that carry weight in game certification. Both run what is called RNG testing and RTP verification. The process is not a one-time rubber stamp. A provider submits its random number generator, its game math, and its payout tables. The lab runs millions of simulated spins, compares the theoretical RTP to the empirical result, and checks that the RNG output is statistically random and not seeded to favour the house beyond the declared edge. If the numbers drift outside tolerance, the game fails.
What that certification gives you as a player is a guarantee that the RTP figure printed on the game is not marketing copy. It is a verified expectation. GLI is the older, more institutional lab, used by land-based regulators and many tier-one online operators. eCOGRA is the online-native counterpart, and its seal is widely recognised in the casino space. When a 1xBet casino game carries either seal, the RTP has been tested against real server behaviour, not just the developer’s spreadsheet.
The distinction matters because the two types of RTP are not the same thing. Theoretical RTP is the mathematical expectation baked into the game code: over an infinite number of spins, the game returns X percent. Empirical RTP is what the server actually paid out over a tested sample. A provider with no lab certification can print any theoretical number it likes. A provider with eCOGRA or GLI certification has had that number independently checked, and the game has been shown to behave as declared.
Why the seal is not the same as the licence
Players often confuse the operator’s gambling licence with game certification. They are separate layers. 1xBet’s Curaçao eGaming licence covers the operation of the sportsbook and casino: taking wagers, holding deposits, processing withdrawals, and meeting responsible-gambling obligations. It does not certify the math inside every slot. That job falls to the labs. A casino can hold a valid licence and still host uncertified games. So the licence tells you the operator is regulated; the eCOGRA or GLI seal tells you the specific game’s RTP is real.
How to check RTP certification on 1xBet games before you wager
Start with the game itself, not the lobby. Open any slot or table game and look for the info or help panel, usually a small «i» icon or a question mark in the corner. Certified games display the RTP percentage there, and reputable providers list the testing lab alongside it. If you see «eCOGRA certified» or a GLI mark, you have independent verification. If you see only a bare percentage with no lab named, treat it as an unverified theoretical figure until you find evidence otherwise.
Cross-check the provider. 1xBet hosts games from dozens of studios, and certification is granted per provider, not per casino. A studio like a tier-one slots developer will have its entire catalogue tested; a smaller or white-label provider may not. If you cannot find the provider’s certification status on its own website, that is a red flag. The lab publishes lists of certified providers, and both eCOGRA and GLI maintain public registers you can search.
Know what the number means for your bankroll. A 96 percent RTP slot returns 96 euros for every 100 wagered over the long run, meaning the house edge is 4 percent. A 92 percent RTP game has an 8 percent edge, which is double the cost per spin. 1xbet original offers additional context worth reviewing. On a 1xBet casino session with real money, that gap compounds fast. This is why the certification matters more than the headline number: an uncertified 97 percent RTP claim is worth less than a certified 95 percent, because only one of them has been checked against actual server results.
The gap between displayed RTP and verified RTP on 1xBet
Here is the part most casino pages skip. 1xBet displays RTP percentages on its game tiles and info panels, and those numbers are generally accurate for certified providers. But not every game in the lobby comes from a certified studio. For uncertified games, the displayed RTP is a theoretical figure supplied by the developer, and it may not reflect what the server actually pays out over real sessions. There is no independent check, no lab report, and no empirical sample behind it.
That does not automatically mean the game is rigged. Most uncertified providers still run honest RNGs and honour their declared math. But the point of independent verification is that you do not have to take anyone’s word for it. Without an eCOGRA or GLI seal, you are trusting the provider’s own claim. With the seal, a third party has confirmed the claim against real data. The practical difference for a player is the difference between a promise and a proof.
This is also where the 1xBet app matters. The mobile app surfaces the same game catalogue as the desktop site, and the same certification logic applies. When you open a game in the 1xBet app, check the info panel the same way. The app does not add or remove certification; it just gives you faster access to the same games. If a game is certified on desktop, it is certified in the app, and vice versa. The verification trail follows the game, not the platform you play it on.
Worth noting for context: 1xbets.bet is not the official 1xBet website, and third-party mirrors sometimes host game catalogues that differ from the official platform. If you are checking RTP certification, do it on the official 1xBet domain or the official 1xBet app, because that is where the provider relationships and game versions are controlled. A mirror site may show the same game with a different build or a different RTP configuration, and your certification check would be meaningless against the wrong version.
For players who want the full picture before committing real money: 1xBet provides sports betting and casino under one account, and the casino side includes over 50 bonuses, a welcome package up to 1500 euros plus 150 free spins, and a 30 percent cashback bonus. Those promotions affect your effective value, but they do not change the RTP of the games you play. A 100 percent deposit match on a 94 percent RTP slot still leaves you with a 6 percent house edge per spin. The bonus softens variance; it does not fix bad math.
The partner roster is a separate signal of scale, not of game certification. 1xBet is a partner of Barcelona and a partner of Serie A, which tells you the operator has the marketing budget and regulatory standing to sign top-tier sports deals. It does not tell you whether a specific slot’s RTP has been lab-tested. Keep the two ideas separate. Brand partnerships speak to the sportsbook side; eCOGRA and GLI seals speak to the casino math.
When you sit down to play, the routine is straightforward. Pick a game, open the info panel, and look for the lab seal. If it is there, the RTP is verified and you can trust the number. If it is not, either find a certified alternative from the same provider or accept that you are playing on an unverified figure. Check the provider’s own certification page if the in-game panel is vague. And if you are using a bonus, read the wagering terms before you assume the RTP applies to your bonus balance the same way it applies to cash. A few minutes of checking before you deposit saves you from guessing after you withdraw.