This article explains what Source of Funds (SOF) means, why KAST may request it, what documents are accepted, and how to submit them. It also answers common questions and provides guidance to help your verification go smoothly.
What Is Source of Funds?
Source of Funds (SOF) is documentation that shows where the money you use on KAST comes from. It helps confirm that your funds are legitimate, traceable, and compliant with financial regulations.
SOF relates to the origin of your money, not your identity or address. Examples include salaries, business income, investments, savings, or asset sales.
Why Do I Need To Provide My Source of Funds?
KAST is required by global financial regulations to verify that the funds moving through our platform are lawful and transparent. Providing SOF helps KAST:
- Comply with anti-money laundering (AML) requirements
- Prevent fraud and financial crime
- Understand the typical activity expected on your account
- Keep your wallet safe from misuse
What Documents Can I Submit As My Source of Funds?
You can submit any document that clearly shows how you earn or receive your money. Below are accepted types:
A. Employment Income
- Recent payslip(s) (less than 6 months)
- Employment contract
- HR letter confirming salary
- Bank statement showing salary deposits
B. Business or Self-Employed Income
- Business bank statements
- Invoices + corresponding deposits
- Tax filings showing business revenue
- Company registration + proof of revenue
C. Investments
- Brokerage account statements
- Dividend statements
- Crypto exchange history showing asset origin
D. Savings
- Bank statements showing accumulation over time
- Fixed-deposit certificates
E. Property or Asset Sale
- Sale agreement
- Payment receipt
- Lawyer or agent confirmation letter
F. Gifts or Inheritance
- Gift letter from sender
- Bank statement showing incoming transfer
- Legal/estate documents for inheritance
Document Requirements
- Must show your name
- Must show dates (typically within the last 3–6 months)
- Must be clear and readable
Do Digital Account Statements Count as Source of Funds?
Statements from digital financial platforms (such as Wise, Deel, PayPal, Revolut, and similar services) are commonly used today, but they may not fully satisfy Source of Funds (SOF) requirements on their own.
If you provide a statement from one of these platforms, please also include a supporting statement from a traditional bank account that:
- Shows incoming funds or salary deposits
- Displays a positive, active balance
- Confirms that the digital account is funded by a verifiable financial source
This additional documentation helps KAST clearly verify where your funds originate, which is required under KYC and AML regulations.
Digital platform statements alone may be insufficient if they lack complete account details, do not show clear funding history, or cannot verify the origin of the money being used on KAST.
How Do I Submit My Source of Funds on KAST?
If KAST requests SOF, you’ll receive a prompt in the app.
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What Happens After I Submit My Documents?
Once you submit your SOF:
- Your documents are reviewed by our compliance team
- You may be contacted for clarification
- Upon approval, no further action is required
Most reviews are completed within 1–3 business days.
Why Was My Source of Funds Rejected?
A submission can be rejected for common reasons:
- Document is too blurry or cropped
- Name does not match the KAST account
- Date is missing or too old
- Document does not clearly show the flow of funds
- Uploaded file is edited or altered
- The document type does not match your stated income source
Frequently Asked Questions
Do I need to submit SOF every time?
No, you only need to submit SOF when KAST requests it. This typically happens for compliance reasons or when your activity reaches certain thresholds.
Can I use the same document for multiple purposes?
Yes, you can reuse a document as long as it clearly shows your source of funds. It must still meet all verification requirements at the time of submission.
Do screenshots count?
No. Screenshots are not accepted for SOF verification. Documents must be a clear photo taken with a camera or a full scan of the original document, showing all required details.
What if I don’t have documents in my name?
You may need to provide additional explanation or alternative supporting documents. The Concierge team will help you determine what is acceptable.
Is my information secure?
Yes, your documents are encrypted and handled according to strict data-protection standards. Only authorized compliance personnel can access them.
Will you share my information with external sources?
No, KAST does not share your SOF documents with external parties except where required by law or regulation. Your information is used solely for compliance verification.
What if my income varies month to month?
You can submit multiple statements that show a typical pattern of your earnings. This helps provide a clearer picture of your financial activity.
Do crypto profits count as a source of funds?
Yes, crypto profits are accepted as long as you provide transaction history showing how the crypto was obtained. Exchange statements or wallet histories are typically required.
What happens if I don’t provide SOF?
Your account may experience temporary limitations until verification is completed. These restrictions are removed once acceptable documentation is submitted.
Do I only need to submit one document?
In many cases, one clear document is enough as long as it fully explains the source of your funds. If your financial situation is more complex, you may be asked to submit more than one document for clarity.
Which document should I pick to submit?
Choose the document that best represents how you primarily earn or receive your money. If you have multiple income sources, submit the clearest and most complete documentation first, and the team will request more only if needed.