Identify the evidence required for the other contribution and the actual gap. One complete history does not automatically establish the second.
Track requests by source
Ask for records that answer the relevant source question. Do not invent a common origin or assume a relative’s declaration overrides required supporting evidence.
The signed loan agreement, the bank's disbursement record, statements showing the investor received and then transferred the proceeds, the currency-conversion record, and the escrow or enterprise receipt establish the core source-and-path chain. How the capital was generated: financial statements over the relevant years, corporate records, tax filings, and the specific transaction that produced the funds, whether retained earnings, an asset sale or a distribution. Brokerage statements showing the account's history, tax returns reporting the income that funded it and the gains realized, the company records behind that income, and the liquidation and transfer records to the enterprise. For lawful source, the file goes back further: how the investor originally acquired the industrial-supply firm's shares, whether by founding it, buying it or inheriting it, with corporate records and personal tax returns from that period. USCIS does not expect every dollar of a forty-year operation to be tied to a pay stub, but it does expect a coherent history supported by tax returns, corporate financial statements, the original purchase documents for the land and the records of the quota exchange.