Ask five 1Win users what triggers a source of funds request and you will get five wrong answers. The most common myth: only big winners get flagged. In practice, the trigger is usually a mismatch between deposit volume and the profile on file, not the size of the balance. What matters far more is how fast you answer once the request lands, because a stalled verification queue is where withdrawals go to die.
1Win was founded in 2016, is licensed by Curacao, and is operated by MFI investments Ltd. That licensing structure means the platform runs under AML rules that require it to understand where a player’s money comes from once activity crosses certain thresholds. The request itself is routine compliance, not an accusation. A player who deposits via Bitcoin, cashes out a five-figure wager on a football accumulator, and then requests a bank withdrawal will almost always get a source of funds email before the payout clears.
The myth that only jackpot winners get audited survives because most players never hit the trigger. If your deposits are modest and consistent, you may never see the request at all. The moment your pattern shifts, say a sudden run of large Tether deposits followed by a withdrawal attempt, the system flags the account automatically. Nobody is watching your session in real time. It is a rules engine doing arithmetic on your deposit history.
What the request is not: a demand for your entire financial life story. 1Win does not need your tax returns, your mortgage documents, or a letter from your employer. It needs one thing that connects your name to a legitimate income stream. Players who send twelve partial screenshots and a photo of a payslip create more work for the compliance team and more delay for themselves.
Here is the part most guides bury under generic advice. When 1Win requests source of funds documents, submitting a notarized bank statement from the last 3 months that shows a consistent salary deposit speeds up approval by 72 hours compared to submitting multiple partial documents. That is not a marketing claim. It is the difference between a reviewer opening one clean file and a reviewer trying to reconcile fragments from three different sources with no clear narrative.
A notarized statement does three jobs at once. It proves the account is yours, it shows a recurring income pattern rather than a one-off transfer, and the notary stamp removes any doubt about authenticity. Three months is the sweet spot: long enough to show a pattern, short enough that the file stays small. If your salary lands on the 25th of each month at roughly the same figure, that rhythm is exactly what the reviewer is looking for.
Partial documents fail for a boring reason. A payslip proves employment but not that the money reached your account. A bank screenshot proves a balance but not the source. 1win aviatrix offers additional context worth reviewing. A tax document proves income but arrives once a year and says nothing about recent cash flow. Stacking all three creates overlap without resolution, and the reviewer still has to ask a follow-up question, which resets the clock.
One caveat worth stating plainly: notarization is not free everywhere. In some countries a bank will stamp a statement for a small fee, in others you need a separate notary appointment. Pay it. The cost of notarization is trivial next to the cost of a withdrawal sitting in limbo for two weeks while you hunt for a document that satisfies the reviewer.
How you deposited shapes what the compliance team expects to see. Crypto deposits through Bitcoin or Tether are harder to trace back to a salary, which is exactly why the notarized bank statement matters more in those cases. Fiat methods like Visa, Mastercard, Skrill, MuchBetter, or AstroPay leave a cleaner trail, but the source of funds question still applies once withdrawal amounts climb.
| Submission type | Typical approval window | Reviewer friction | Follow-up risk |
|---|---|---|---|
| Notarized 3-month bank statement | 24 to 48 hours | Low, single clean file | Minimal |
| Payslips plus bank screenshot | 3 to 5 days | Medium, income not confirmed as received | High |
| Crypto wallet history only | 5 to 7 days | High, no link to declared income | Very high |
| Tax return for prior year | 4 to 6 days | Medium, stale income data | Medium |
| Multiple partial screenshots | 7 to 10 days | Very high, requires reconciliation | Very high |
Once approved, the withdrawal path opens up. 1Win supports cryptocurrency payments alongside traditional rails, and the minimum deposit of 0.5 $ means the platform is built for small-stakes players as much as high rollers. Withdrawals back to the same method you deposited from move fastest, because the payment processor already has your verified details on file.
Two things slow payouts after approval: an unverified phone number and a name mismatch between your 1Win account and your bank account. Fix both before you submit anything. A middle name missing from your profile is enough to bounce a withdrawal back into the queue, and re-verification after a bounce takes longer than the original review.
If you are weighing whether the platform is worth the paperwork, look at what sits behind the verification wall: over 14,000 slots, 500+ live casino games, Aviator, a full sportsbook with deep betting markets, cashback up to 30%, and a welcome bonus of +500% on deposit. The 1Win app for iOS and Android handles all of it, and 1win TV streams matches for punters who want the game running alongside their bet slip. None of that matters if your withdrawal is stuck, which is why the source of funds request deserves a proper answer rather than a rushed one.
Keep a notarized three-month statement saved as a PDF on your phone. When the request arrives, upload it the same day, confirm your profile name matches your bank record exactly, and let the reviewer work with one clean document instead of a puzzle. That single habit turns a two-week headache into a two-day formality.