Most investors who have not done much research on the requirements of the source of funds assume that commercial bank deposits should not be a problem. This assumption is false. USCIS wants to know how those funds came into their account in the bank. What kind of property was sold, and at what price? When and how did they purchase the sold property? They would need to show the source of funds used when they purchased the sold property. Unfortunately, in many developing countries, transactions are consummated in cash. Even if they pay the taxes due from those commercial transactions, it is difficult for investors to document those. That is why we strongly advise our clients to consult with their immigration attorneys. They should give them the whole picture so that their attorney could advise them on the best path to take in terms of which sums of money to use to fund the EB-5 investment.