What is source of funds verification and when is it required?
Proof that the crypto you're depositing came from a legitimate source. Required for very large deposits or unusual patterns.
What it is
Source of Funds (SoF) verification answers the question: where did this money originally come from?
Required by anti-money-laundering (AML) regulations when deposit volume crosses certain thresholds, regardless of how lawful the source actually is. This is industry-standard at every licensed casino, exchange and bank — Cinoslots simply applies the same rules.
When it's triggered
- Deposits over $50,000 USD equivalent in 30 days
- Single withdrawal over $100,000
- Unusual pattern (e.g. sudden 100× increase in deposit size)
- Compliance flag (e.g. deposit from a wallet associated with sanctioned activity)
- Random selection (~1% of high-volume accounts annually for routine audit)
What we accept as evidence
The right document depends on how you earn money:
Salary income
- 3 most recent payslips
- Or annual employment contract showing salary
- Or bank statements showing regular salary deposits from your employer
Self-employed / business owner
- Recent tax return
- Business bank statements (3 months)
- Accountant's letter on company letterhead
Investment / trading income
- Brokerage statement showing realized gains
- Crypto exchange withdrawal history showing the funds you're depositing
- DeFi/wallet history showing the origin
Inheritance / gift
- Will or grant of probate
- Legal letter from solicitor
- Gift declaration with sender's signature
Property sale
- Sale completion statement from solicitor
- Bank statement showing the proceeds
Crypto-native source (mining, staking, NFTs, original buying years ago)
- Mining pool payout history
- Staking reward records
- NFT sale history
- Original purchase records (e.g. early Coinbase purchases from 2017)
What if you can't easily prove source?
This happens, and it's not necessarily disqualifying. Common cases:
- Long-term hodler without record-keeping → wallet history showing original receive transaction is often sufficient
- Self-custody-only user → wallet activity history + a written explanation
- Cash gifts from family → notarized declaration from the giver
Talk to compliance. We're pragmatic; we just need a coherent, documented story.
What we don't accept
- "It's from gambling winnings" without documentation of where the gambling stake came from
- Cash gifts undocumented
- Sources you cannot explain
- Documents that contradict your account's KYC (e.g. salary in a country where you said you don't reside)
Privacy
SoF documents are stored encrypted, accessible only to compliance, and deleted 5 years after account closure. Same protections as all KYC.
Processing time
- Standard: 24–48 hours
- VIP Gold+ priority: under 4 hours
- Complex cases (multi-jurisdictional, multi-source): up to 5 business days
If we need more info, we'll email you specific follow-ups within the first 24 hours.
Why this exists
Without SoF checks, casinos would be the easiest money-laundering rail in finance. Regulators worldwide require all licensed operators to maintain SoF programs. Cinoslots' Curaçao license mandates it; we'd be shut down if we didn't.
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Related articles
When do I need to verify my identity (KYC)?
Most players never KYC. We trigger it for large withdrawals, suspicious activity or regulatory requirement.
What is the maximum withdrawal limit?
$100,000/day for non-VIP, scaling to unlimited at Elite VIP. Manual review applies above $10K. Your VIP host can lift caps for one-offs.
Which documents are accepted for KYC verification?
Government photo ID + selfie liveness for basic; add proof of address for intermediate; add source-of-funds for enhanced.