Source of Funds Investigation

A Source of Funds (SOF) investigation traces the origin of cryptocurrency assets to document where they came from. We follow the blockchain trail backward from your current holdings to identifiable sources like exchanges, mining pools, airdrops, or other legitimate origins. This documentation is commonly required by banks, legal proceedings, tax authorities, or regulatory bodies to verify that funds are legitimate.

Banks are required by anti-money laundering (AML) regulations to verify the source of large deposits and new customer funds. Because cryptocurrency transactions aren't inherently tied to identity, banks need documentation proving that crypto-derived funds came from legitimate sources. Our reports provide the verifiable blockchain evidence that compliance departments need to satisfy regulatory requirements.

We can trace transactions back to the genesis of each blockchain—2009 for Bitcoin, 2015 for Ethereum, and so on. The practical depth depends on the complexity of the transaction history. For most cases, we trace funds to identifiable sources like exchange withdrawals, mining rewards, airdrops, or NFT sales. We continue tracing until we reach satisfactory source identification.

Our reports are specifically designed to meet banking compliance requirements and have been accepted by major financial institutions worldwide, including banks in the US, UK, EU, Switzerland, Singapore, and many other jurisdictions. We can customize reports to meet specific institutional requirements if needed. Our 100% bank acceptance rate reflects our understanding of compliance requirements.

We support all major blockchains including Ethereum (and L2s like Arbitrum, Base, Polygon), Solana, Bitcoin, BNB Chain, Avalanche, and many others. We can trace funds across cross-chain bridges, maintaining continuity as assets move between networks. Contact us for specific blockchain support inquiries.

Standard reports are delivered within 5-7 business days. Priority processing (2-3 days) and urgent processing (24-48 hours) are available for time-sensitive cases such as pending bank deadlines or legal filings. Complex cases with extensive transaction history or multiple chains may require additional time.

We handle complex transaction histories including DeFi activities. For funds that have passed through DeFi protocols, we document each interaction and continue tracing to original sources. For mixer transactions, we note the mixer interaction and can often establish probable connections through timing and amount analysis. We provide honest assessment of what can and cannot be definitively proven.

Yes, we have extensive experience tracing funds from historical and defunct exchanges including Mt. Gox, BTC-e, and others. We can document withdrawal histories and trace coins through subsequent transactions. This is particularly valuable for early Bitcoin holders proving long-term legitimate ownership.

You receive a comprehensive package including: Executive summary suitable for banks and non-technical readers, complete annotated transaction history, fund flow visualization diagrams, source identification with verification links, methodology explanation, and supporting spreadsheets. Reports are delivered in PDF format with Excel data files.

Yes, we provide support for questions from your bank or other parties reviewing the report. We can clarify findings, provide additional documentation if needed, and help resolve any questions that arise during the compliance review process. This support is included in our service.