Bring the purchase agreement, closing statement, deposit ledger with remaining obligations, and the seller's recent financial statements. For funding, provide records showing lawful origin and each transfer step into the U.S. enterprise. Gaps can usually be supplemented later, so identify them early rather than abandoning a source.
Trace the deposit liability into your own accounting
Ask the seller's bookkeeper how deposits were recorded and whether the corresponding cash still exists. A hypothetical buyer of a Florida installation company might inherit forty prepaid orders with materials never ordered; that shortfall becomes an immediate expense to fund. Keep business expenditure separate from immigration preparation costs, and have counsel review how each spending category is actually treated rather than assuming a single rule.
Build a dated path from the lawful source of funds to the actual investment, identifying transfers, currency conversions and any relevant agreements along the way. Money leaves an identified account on a date, arrives somewhere on a date, and becomes irrecoverable on a date because of a specific contractual term. Each dollar should be traceable from a lawful origin, through an identifiable account, to a recipient who has issued something acknowledging receipt.
Bring the cap table, the shareholders' or operating agreement, and any voting, veto or board provisions.