A source of funds request from a bank is one of the more stressful moments a business or individual can face, partly because it often arrives without warning and partly because the requirements are rarely explained. The account is under review, funds may be held, and the customer is asked to evidence where their money came from. What satisfies the reviewer is frequently misunderstood, and the misunderstanding causes most of the delay.
Source of funds is not the same as source of wealth
The two terms are used loosely, but a reviewer distinguishes them sharply, and so should anyone responding.
Source of funds is the origin of the specific money in question: the particular funds that arrived in the account, or that will be used for a particular transaction. Where did this money come from, immediately and traceably.
Source of wealth is the bigger picture: how the customer accumulated their overall wealth over time. What is the economic activity that explains the customer having money at all.
A reviewer asking about a specific large deposit wants source of funds. A reviewer assessing a high-net-worth customer's overall profile wants source of wealth. Answering the wrong question, or conflating the two, signals that the customer has not understood what is being asked, which prolongs the review.
What actually satisfies a reviewer
A reviewer is trying to establish one thing: that the money has a legitimate, evidenced and plausible origin consistent with what the bank already knows about the customer. Three elements have to be present.
It has to be specific. Savings or business income is a category, not an explanation. The reviewer needs to know which savings, from what, accumulated how, or income from which business activity over what period.
It has to be evidenced. An assertion is not a source of funds. The claim has to be supported by documents: bank statements showing the funds accumulating or arriving, a contract of sale for a property or business, completion statements, dividend vouchers, an inheritance grant of probate, an employment contract and payslips. The evidence has to actually correspond to the explanation, in amount and timing.
It has to be consistent. The explanation has to fit the customer's known profile. A deposit that matches the customer's stated business and history closes quickly. A deposit that has no relationship to anything the bank knows about the customer is what triggers the review in the first place, and a vague explanation confirms the concern rather than resolving it.
The traceable pathway
The element customers most often miss is the pathway. It is not enough to show that money exists; the reviewer needs to see how it travelled from its origin to the account under review. Where funds have moved through several accounts or jurisdictions, each step needs to be visible and documented. A break in the chain, a point where the money appears without explanation, is exactly what a reviewer cannot sign off, however legitimate the ultimate origin.
This is why offshore or multi-step funds attract more questions: not because they are presumed illegitimate, but because the pathway is harder to evidence, and an unevidenced pathway cannot be cleared.
How to respond well
The customers who clear these reviews quickly do three things. They identify whether the bank is asking about source of funds or source of wealth, and answer that question. They provide a specific, documented explanation in which the evidence matches the claim in amount and timing. And they show the complete pathway from origin to account, with no unexplained gaps.
The customers who do not, who respond with categories instead of specifics, assertions instead of documents, or pathways with gaps, find that a review that could have closed in days extends into months.