The overwhelming majority of casino bonuses are legitimate promotions from licensed operators. But the industry has its bad actors, and a couple of minutes of due diligence protects both your money and your personal data.
1. No visible license
Every legitimate online casino displays its gambling license, typically from Malta, Gibraltar, the UK, Curaçao, or a US state regulator, in the site footer. No license number you can verify means no accountability if they refuse to pay out. Walk away.
2. Payment details for a 'free' bonus
A genuine no deposit bonus requires registration, not your card. Some casinos legitimately ask for card verification to prevent bonus abuse, but if a site demands a deposit-ready payment method before releasing a 'no deposit' offer, treat it with suspicion.
3. Wagering requirements above 50x
At 50x or 60x wagering, the odds of ever converting bonus winnings into withdrawable cash are close to zero. These offers exist to generate sign-ups, not winners. They're not illegal, just not worth your time.
4. Vague or hidden terms
If you can't find the bonus terms, or they're written so vaguely that the casino could void winnings for almost any reason ('irregular play' with no definition), assume the ambiguity will be used against you.
5. No responsible gambling tools
Licensed operators must offer deposit limits, self-exclusion, and reality checks. Their absence usually means the casino is unlicensed. See red flag number one. A casino that doesn't invest in player protection doesn't deserve your play.