Source of Funds Documentation: What Counts as Acceptable Evidence
Source of funds is where high-risk relationships succeed or fail. Here is exactly what counts as acceptable documentation in 2026.
Asking a customer 'where did this money come from?' is straightforward. Documenting the answer to an examiner's satisfaction is not. Source of funds evidence is the single most common weakness in EDD files, and the gap regulators most consistently cite when reviewing high-risk customer relationships.
This guide explains what source of funds means, how it differs from source of wealth, and exactly what documentation counts for the most common funding scenarios.
Source of Funds vs Source of Wealth
Source of funds describes the origin of the specific money entering the relationship. Source of wealth describes how the customer accumulated their overall net worth. Both are required for high-risk relationships; many EDD findings stem from conflating the two.
Acceptable Evidence by Scenario
Salary: recent pay stubs plus employer confirmation and a bank statement showing receipt. Business income: filed tax returns, audited financials and operating account statements. Sale of property: signed deed, closing statement and proceeds wire confirmation. Inheritance: probate document, executor letter and disbursement evidence. Sale of business: signed SPA, closing memorandum and escrow release. Investment gains: brokerage statements showing realized gains.
Crypto-Sourced Funds
Acceptable: exchange transaction history with verified KYC, on-chain analytics report tracing the funds to a clean source, capital gains tax records. Unacceptable: a screenshot of a wallet balance.
What Examiners Look For
A consistent paper trail: declared source, supporting documents, third-party confirmation where possible, and a written analyst memo connecting the dots. Missing any layer weakens the file.
Red Flags in Source of Funds
Reluctance to provide documents, third-party transfers without explanation, structuring just below reporting thresholds, geographies inconsistent with declared income and round-trip transactions through high-risk jurisdictions all warrant escalation and likely SAR consideration.
Documenting the Decision
The analyst memo is the centerpiece. State the declared source, list the documents reviewed, describe the verification steps, note the residual risks and recommend disposition. Senior management signs off.
Refresh and Re-Verification
Source of funds evidence ages. Refresh on a risk-based cadence — annually for high risk — and whenever transaction patterns materially change or new large inflows arrive.
Key Takeaways
- Source of funds ≠ source of wealth — collect both for high risk.
- Acceptable evidence is third-party verifiable, not customer-attestation.
- Crypto-sourced funds require on-chain analytics, not screenshots.
- The analyst memo is the deciding artifact at exam.
Related Verification Services
Investigate and document wealth origin.
Document legitimate income sources.
In-depth investigation for high-risk customers.
Identify domestic and foreign PEPs.
Frequently Asked Questions
Can a customer attestation alone count as source of funds?
No. Attestation is a starting point; verifiable third-party documents are required for EDD-level relationships.
How recent must evidence be?
Generally within 90 days, longer for one-time events like an inheritance with dated probate documents.
Can we accept bank statements with redactions?
Limited redactions for unrelated information are acceptable; redactions that obscure source, payee or balance are not.
Is source of funds required for low-risk customers?
Not routinely. It is triggered by risk rating, transaction patterns or specific large inflows.
Who approves source of funds memos?
An independent senior reviewer at minimum; for very high-risk relationships, an executive committee.
Need bulletproof source of funds files?
We collect, verify and document source of funds and wealth — analyst memo and senior sign-off included — within five business days.