August 15, 2025
These are the online casinos we advise players to avoid, and for each one we show you why. Every entry is backed by documented evidence: independent safety ratings, unresolved player complaints, regulator actions or findings from our own research into the companies behind them. A blacklist without evidence is just an opinion, and you deserve more than that before deciding where to put your money.
We split the list into two levels. Avoid means we've seen documented cases of players losing winnings, fake licences or insolvency. Caution means serious concerns, such as reduced game payouts or unresolved licensing questions, that we'd want you to know before depositing.
These are the online casinos we advise players to avoid, and for each one we show you why. Every entry is backed by documented ev...
We add a casino when we find documented evidence of one or more of the following:
We don’t blacklist casinos for being dated, dull or not to our taste. And we review entries: if a casino resolves the issues, or if new evidence shows we were wrong, we update or remove it. Our review policy explains our wider process.
| Casino | Operator / licence | Why it’s on the list | Evidence |
|---|---|---|---|
| Winzter Casino | Rabocse SRL / Anjouan | Verified accounts closed with winnings withheld; players allege counterfeit games | casino.guru Safety Index 3.3 (“very low”); casino doesn’t respond to its complaints; AskGamblers player rating 1/10 |
| Dream.Bet | NewEra B.V. / Curaçao | Withdrawals refused on disputed terms, including after a player asked to close his account | casino.guru Safety Index 3.8 (“low”); Trustpilot 2.0 |
| OceanSpin | See our caution notice | Misrepresented licence claim; reports of withheld funds | Our caution notice |
| Spinlynx | Disputed | Licences flagged as fake | casino.guru Safety Index 0.0, at the time of our research |
| Former Casbit Group brands: Lalabet, JungliWin, Justbit, 0x.Bet, 4Kasino, TrueFlip, Spinybet | Casbit Group N.V. (now SkyGrow Group Limitada, Costa Rica) | Parent company declared bankrupt over unpaid player winnings | Court of Curaçao bankruptcy, December 2024, over €619,500 owed to players |
| Wonaco Casino | Offshore | Player funds frozen for months | Safety Index 4.2/10; documented four-month account freeze with about €1,000 trapped |
| Mafia Casino | NovaForge network | Reported systematic RTP reduction; worst reputation in its network | Trustpilot 2.1/5; independent reports of reduced RTP |
Winzter is our most recent addition and the clearest example of why evidence matters. A fully verified Swedish player had his account closed without explanation while holding a €10,000 balance and two withdrawals under review, and was offered only his deposits back. A VIP player reported his balance cut from €13,300 to €3,900 with every pending withdrawal cancelled. Players have also alleged that some games are counterfeit copies. An earlier version of our own review rated Winzter highly; we’ve withdrawn that rating. Full details are in our Winzter caution notice.
Dream.Bet (dream.bet) is run by NewEra B.V. under a Curaçao licence. In one documented complaint, an Irish player told the casino his gambling was getting out of control and asked it to close his account. The casino suspended the account but rejected his €2,500 withdrawal over a rollover requirement, even though he says he had declined the bonus. A casino that responds to a player asking for help by withholding his balance is exactly what this list exists to flag. Note that Dreambet.io is a separate site with its own “low” casino.guru rating of 3.9; we’d avoid both.
Casbit Group N.V. was declared bankrupt by the Court of Curaçao in December 2024 over €619,500 in unpaid player winnings, with a single player owed more than €237,000. Earlier in 2024 the Dutch regulator had imposed a penalty of €280,000 per week for targeting Dutch players without a licence. Operations moved to a new company, SkyGrow Group Limitada in Costa Rica, a country that doesn’t issue real online gambling licences. Many comparison sites still describe these brands as legitimate, citing a licence that no longer applies.
| Casino | Concern | Evidence |
|---|---|---|
| Rooster Bet | Reduced RTP in independent testing; licensing confusion | Tested RTP of 94% on some titles, below standard settings |
| Boomerang Bet / Boomerang Casino | Claims of lowered slot RTP; harsh wagering terms | Player and reviewer reports |
| StoneVegas | No RTP transparency; manipulation complaint | Documented complaint; no published RTP settings |
| CrownPlay | Conflicting licence information; withdrawal delays and account closures | Licence details differ across sources; documented complaints |
| Letou and LT Casino | Blacklisted by multiple review platforms | Operator group fined €24.84 million by the Dutch regulator; its Curaçao registration dissolved in March 2026 |
| SkyHills Casino | Unresolved licensing red flags | Licence claims we could not verify |
Some problems sit at the level of the company behind many casinos rather than one brand:
Not every brand in these groups is a problem. We judge casinos individually, but a group’s history is part of the picture.
You don’t need to wait for a casino to appear on a blacklist. These signs are worth acting on:
Our best online casinos page explains the red flags we check in more detail, and our guide to best payout slots shows how to check a game’s RTP.
Our guide on whether you can sue a casino for not paying out explains the realistic routes.
A blacklist should be corrected when it’s wrong. Earlier versions of this page listed some casinos we’ve since removed: one entry appears to have confused a well-rated casino with a similarly named brand, some couldn’t be verified with current evidence, and one was listed simply for looking dated, which isn’t a reason to warn players away. If you see a casino missing that you think belongs here, or listed here that shouldn’t be, tell us.
If a casino has withheld your winnings, closed your account without explanation or misrepresented its licence, contact us with the details and any evidence. Player reports are how several entries on this page started, and we check every one before adding it.
If gambling has stopped feeling like entertainment, especially after a loss at a casino like these, our stop gambling page lists where to find support, and our guide on how to ban yourself from gambling explains self-exclusion.
Every casino on this list is here because of evidence: withheld winnings from verified players, fake or misrepresented licences, an insolvent operator that left players unpaid, frozen funds, or manipulated game payouts. Winzter, Dream.Bet, OceanSpin, Spinlynx, the former Casbit brands, Wonaco and Mafia Casino are ones to avoid; the casinos on our caution list carry concerns you should weigh first.
The best protection is to check for yourself: a strong licence, a named operator with a clean history, clear withdrawal terms, and a casino that engages when things go wrong.
It’s a list of online casinos that players are advised to avoid because of documented problems such as unpaid winnings, fake licences, manipulated games or unfair terms. Ours shows the evidence behind every entry.
Because of a very low independent safety rating (casino.guru Safety Index 3.3), documented cases of verified players having accounts closed and winnings withheld, player allegations of counterfeit games, and a refusal to engage with complaint mediation.
We don’t consider it safe. It has a “low” casino.guru Safety Index of 3.8 and documented complaints about refused withdrawals, including a case involving a player who asked to close his account because his gambling was getting out of control.
Casbit Group N.V. was declared bankrupt by the Court of Curaçao in December 2024 over €619,500 in unpaid player winnings. Its brands, including Lalabet, Justbit and TrueFlip, moved to a company in Costa Rica.
We need documented evidence: independent safety ratings, unresolved complaints, regulator actions or our own research into the operator. We don’t blacklist casinos simply for being dated or not to our taste.
Yes. If a casino resolves the issues that put it here, or if evidence shows we were wrong, we update or remove the entry.
“Avoid” means documented cases of players losing money, fake licences or insolvency. “Caution” means serious concerns, such as reduced RTP or unresolved licence questions, that you should weigh before depositing.
Find the licence number in the casino’s footer and look it up on the regulator’s own register. A missing, expired or outdated-format number is a reason to investigate further.
Stop depositing, request a withdrawal, save evidence, complain in writing, then escalate to independent mediation and the licensing authority. Speak to your card provider about any unauthorised charges.
Contact us with the casino’s name, what happened and any evidence you have. We check every report before adding a casino to the list.
