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A multi-market casino across Romania, Denmark, Spain, and the Netherlands
Visit One Casino →One Casino welcome bonus in Spain
Context for Spain: Spain banned welcome bonuses for new customers under Royal Decree 958/2020, but the Supreme Court annulled that part of the decree in April 2024, so sign-up offers are lawful again. A reintroduction of the ban has since been proposed, so any Spanish welcome offer should be treated as subject to change. Only operators on the DGOJ register may offer gambling in Spain. Spain has also approved joint deposit limits that apply across ALL the licensed operators you use - reported as EUR 700 a day, EUR 1,750 a week and EUR 3,300 over four consecutive weeks, tracked across your accounts together - so a bonus larger than your lawful deposit ceiling cannot be claimed in full.
Here is the current One Casino welcome offer for players in Spain. Bonus terms change and are set by One Casino for each market — always confirm the live offer on its own site. See every licensed betting site in Spain →
Pros
- Genuine multi-market licensing: ONJN, Danish authority, and Dutch KSA
- A real standout: no-deposit components in Denmark, Spain, and the Netherlands
- Romania's package reaches up to 3,000 RON plus 600 free spins
Cons
- Spain requires 30 days plus KYC before the bonus is released
- Multiple market-specific offers add complexity to compare value
- Ownership/parent-company structure not independently confirmed
Our verdict
One Casino is a genuinely multi-licensed casino, holding an ONJN licence (Romania), a Danish licence, and a KSA licence (Netherlands). Romania: up to 3,000 RON plus 600 free spins across three deposits. Denmark: 100 free spins no-deposit plus a 100% match up to €100 and €10 free. Spain: €10 no-deposit plus 100% up to €100. Netherlands: €10 registration bonus plus 50% up to €100, plus a no-strings €10 sports free bet. We found no regulatory action against this operator in the sources we consulted, which is a statement about our research rather than about the operator.
How we rated it
Bonuses & value (18%)8.5
A real standout: no-deposit bonuses in Denmark, Spain, and the Netherlands, plus a large Romanian package up to 3,000 RON.
Trust & licensing (27%)7.8
A real positive: genuine ONJN, Danish, and KSA licences across three of four markets.
Casino (36%)7.5
A genuinely multi-market operator, licensed by ONJN, a Danish authority, and the Dutch KSA.
Customer support (18%)7
No major documented complaint pattern found.
Quick facts
| Licensing | Genuine ONJN (Romania), Danish, and KSA (Netherlands) licences |
| Markets | Romania, Denmark, Spain, Netherlands |
| Welcome bonus | RO: up to 3,000 RON + 600 FS; DK: 100 FS no-dep + 100% up to €100; ES: €10 no-dep + 100% up to €100; NL: €10 + 50% up to €100 (+€10 sports free bet) |
| Wagering | 35x across markets; ES bonus released after 30 days + KYC per RD 958/2020 |
How we verified this
One thing we could not establish: who owns and operates this brand. The rest of this review is sourced, but an operator we cannot name is one you cannot hold to account.
One Casino holds an ONJN licence (L1244215W001560) for Romania, a Danish licence, and a KSA licence for the Netherlands. No major scandal independently confirmed in this pass. Romania: package up to 3,000 RON plus 600 free spins across 3 deposits, 35x wagering. Denmark: 100 free spins no-deposit plus 100% first deposit up to €100 and €10 free, 35x wagering, weekly no-deposit bonuses for Club One members. Spain: €10 no-deposit plus 100% up to €100, bonus released after 30 days plus KYC under RD 958/2020. Netherlands: €10 registration bonus plus 50% up to €100 on the first deposit (casino), and a €10 no-strings-attached free bet on sportsbook. Confirm current offer directly on One Casino's own site.
Where One Casino is licensed
One Casino appears on the official register in 4 countries. Highlighted countries have a full local review — pick yours for its welcome bonus and licence details.
Europe (4)
About One Casino
One Casino is a casino licensed across Romania, Denmark, and the Netherlands, also serving Spain, offering genuinely large and often no-deposit welcome packages in each market. We found no regulatory action against this operator in the sources we consulted, which is a statement about our research rather than about the operator.
One Casino FAQ
Is One Casino safe and legit?
Yes — One Casino holds genuine licences from ONJN (Romania), a Danish gambling authority, and the Dutch KSA. No major scandal was found during this research.
What is the One Casino welcome bonus?
It varies by market: Romania offers up to 3,000 RON plus 600 free spins across three deposits; Denmark offers 100 free spins no-deposit plus a 100% match up to €100 and €10 free; Spain offers €10 no-deposit plus 100% up to €100; the Netherlands offers €10 plus 50% up to €100 on casino, plus a no-strings €10 free bet on sportsbook.