Evidence availability matters, but lawful source, actual availability and the complete investment proposal must also be assessed.
Compare the real histories
Identify gaps and obligations honestly. A short paper trail is not automatically sufficient and a longer one is not automatically disqualifying. Hypothetical example: a conifer-nursery owner using several years of retained profits and a property refinance.
At a first review, the first review should build a chronological source-and-path record for each stream instead of relying on one final account balance. The records most likely to settle that point are financial statements, tax filings, loan documents, property records, sale or dividend records, and transfer confirmations. Sequence the work deliberately: map each source from origin to investment before the project subscription is finalized.
A common error is a clean bank statement is offered without the underlying records that explain why the money belongs to the investor; that error matters because a conclusion based on incomplete or mismatched facts may not carry to the final arrangement. Write down the decision that remains after the review, the fact that could change it, and the record needed to resolve that fact. This creates a usable file rather than a collection of documents that cannot be connected to the actual plan.