With corporate resolutions declaring dividends or authorizing a share sale or loan repayment, the company's financial statements and tax filings, her personal tax returns, and bank statements showing the money moving from the company to her and then to the U.S. enterprise.
The money must become hers before it becomes the investment
Hypothetical example: the company has retained earnings well above the capital amount, and the owner assumes a transfer from the company's account to the U.S. corporation will do. It will not, because the investor must invest her own capital.
The clean path is a resolution declaring a dividend to her, the payment into her personal account, her tax reporting of it, and then her transfer to the U.S. enterprise; or a sale of some of her shares to a family member or partner with the proceeds paid to her; or repayment of a documented shareholder loan she made earlier. Each is shown with the resolution, the company's statements and returns, her returns and the bank trail.
The company's own lawful history should be summarized: years of operation, financial statements, tax compliance. A cross-border accountant should choose among the methods for tax before the transfer. Present the chain with an index, and file the petition on Form I-526 with the fees on the USCIS schedule.