Before you register at One casino, take five minutes to read this guide — it could save you time and money.
Before You Start
- Ensure you are at least 18 years old (or the legal age in your jurisdiction).
- Have a valid email address and a phone number for verification.
- Prepare a government-issued ID (passport, driver’s license) for KYC checks.
- Choose a payment method you plan to use (e.g., Visa, Mastercard, e-wallet).
- Check the bonus terms: wagering requirements, game contributions, and max bet limits.
- Review the casino’s license and read player reviews on trusted forums.
Registration
- Visit the casino’s website on your desktop or mobile browser. The platform is a mobile-optimized progressive web app (PWA) — you can add it to your home screen for quick access.
- Click the “Sign Up” or “Register” button, usually in the top right corner.
- Fill in the registration form: username, email, password (use a strong combination).
- Select your currency and country of residence.
- Accept the terms and conditions and confirm you are over 18.
- Verify your email by clicking the link sent to your inbox. Some casinos require SMS verification as well.
- Log in and make your first deposit to claim the welcome bonus.
Bonus Math
Let’s calculate the real value of a common welcome bonus: a 100% match up to €100 plus 200 free spins on a slot with 95% RTP. The bonus requires a 35x wagering requirement on the deposit + bonus amount, and free spins winnings are subject to 40x wagering.
Note: Wagering requirements apply before any withdrawal.
Assume you deposit €100. You receive a €100 bonus, so total balance = €200. Wagering requirement: 35 × (€100 deposit + €100 bonus) = 35 × €200 = €7,000.
If you play a slot with 95% RTP, the expected loss per €1 wagered is 5 cents. Over €7,000, expected loss = €7,000 × 0.05 = €350. Since your starting balance is €200, you are expected to lose it all before meeting wagering. However, the free spins can help. 200 free spins at €0.10 per spin = €20 total value. Wagering on free spin winnings: 40 × €20 = €800. With 95% RTP, expected loss on that = €800 × 0.05 = €40. So total expected loss = €350 + €40 = €390. But you only have €200 + €20 = €220. So the bonus is negative expected value overall unless you get lucky.
Formula for bonus EV: EV = (Deposit + Bonus) – (Wagering Requirement × House Edge). For this bonus: EV = €200 – (€7,000 × 0.05) = €200 – €350 = -€150, plus free spins: EV_free = €20 – (€800 × 0.05) = €20 – €40 = -€20. Total EV = -€170. This means the average player loses €170 on this bonus. Important: Only play bonuses if you understand the math and are prepared for variance.
Safety & Licensing
The casino operates under a Curacao eGaming license. While this provides basic oversight, it is less stringent than licenses from Malta or the UK. Note: Players from EU/Nordic countries may be subject to local income tax on winnings from Curacao-licensed casinos, unlike winnings from locally licensed operators. Always check your local tax laws. The site uses 128-bit SSL encryption to protect personal and financial data. Two-factor authentication (2FA) is available for account security.
Banking & Payments
The casino supports a variety of payment methods, including Visa, Mastercard, Skrill, Neteller, and bank transfers. Deposits are instant, while withdrawals typically take 1–5 business days for e-wallets and 3–7 days for cards. The table below summarizes key details.
| Method | Deposit Min | Withdrawal Time | Fees |
|---|---|---|---|
| Visa | €10 | 3–5 business days | None |
| Mastercard | €10 | 3–5 business days | None |
| Skrill | €10 | 1–2 business days | None |
| Neteller | €10 | 1–2 business days | None |
| Bank Transfer | €20 | 5–7 business days | €5 per withdrawal |
Troubleshooting
- Login issues: Clear browser cache and cookies, or try a different browser. If the problem persists, use the “Forgot Password” option.
- Bonus not credited: Ensure you entered a bonus code (if required) and meet the minimum deposit. Contact live chat if not received within 10 minutes.
- Games not loading: Check internet connection, disable VPN, and enable JavaScript. Update your browser or try the PWA version.
- Withdrawal pending for days: Verify your account fully (upload documents) first. If still delayed, contact support after 48 hours.
- Self-exclusion: Go to account settings and select “Responsible Gambling” to set deposit limits or self-exclude for a chosen period.
Common Questions
Can I play on my phone?
Yes, the casino offers a mobile-optimized website that works on all modern smartphones and tablets. You can add it to your home screen for app-like access.
What is the minimum deposit?
The minimum deposit is €10 for most methods, except bank transfers which require €20.
How long do withdrawals take?
E-wallet withdrawals usually take 1–2 business days, while card and bank transfers can take 3–7 business days.
Is the casino licensed?
Yes, it holds a Curacao eGaming license. However, this license may have different consumer protections compared to MGA or UKGC licenses.
Do I need to pay taxes on winnings?
Tax liability depends on your country of residence. Players in Finland, for example, may need to declare winnings from Curacao-licensed casinos as income. Consult a tax advisor.
Can I set deposit limits?
Yes, you can set daily, weekly, or monthly deposit limits in the responsible gambling section of your account.
What games have the highest RTP?
Slots like Blood Suckers (98%) and Jackpot 6000 (98.8%) offer high RTP. Check the game info for exact percentages.
Pro Tips: Handling a Delayed Withdrawal
If your withdrawal is pending beyond the stated timeframe, follow these steps:
- Check your account verification status — ensure all KYC documents are approved.
- Confirm you have met all wagering requirements for any active bonus.
- Contact live chat support and ask for an estimated processing time. Keep a screenshot of the conversation.
- If no response within 24 hours, send an email to the support team with your account ID and transaction reference.
- Escalate to the licensing authority (Curacao eGaming) if the casino fails to pay within 14 business days.
Remember: most withdrawals are processed smoothly; delays are rare but can happen due to verification or technical issues.
Conclusion
This guide covered the essential steps to get started, from registration to understanding bonus math. Always gamble responsibly and never deposit more than you can afford to lose. By following these tips, you can make the most of your experience at the casino.