Source of Funds (SoF)

Source of Funds (SoF) is a verification process that documents and validates the origins of cryptocurrency assets involved in transactions, particularly those exceeding regulatory thresholds. For large transactions, institutions must obtain supporting documentation such as bank statements, exchange transfer records, mining reward confirmations, or employment income verification to establish legitimate origins. SoF verification is typically a point-in-time assessment focusing on the immediate source of funds being transferred, rather than tracing their historical origins. This process is fundamental to know-your-customer (KYC) procedures and helps institutions fulfill their due diligence obligations under AML regulations. Example: When a customer deposits $50,000 worth of Bitcoin to a regulated exchange, the exchange requests bank statements showing the funds' withdrawal source, mining pool documentation if self-mined, or inheritance documentation to verify legitimate origin before account activation. Why it matters for compliance: SoF verification provides the first line of defense against illicit asset flows. By confirming funds originate from legitimate sources, institutions can block criminal proceeds and demonstrate due diligence to regulators.

Category: compliance

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