Each applicant must prepare complete biographical information and the principal applicant must provide evidence to demonstrate how they lawfully obtained the investment funds. Business licenses, brochures about the business and other information about the applicant’s business are also beneficial. Lawful sources of funds include profits from the sales of a property, stocks or bonds, profits from business operations, business transactions, gifts, and inheritances. To prove the source of investment funds, USCIS generally requires five years of tax returns, five years of bank records, proof of ownership in any businesses, financial statements for each business and business licenses. The idea is to present a track record of an honest course of dealing. If your capital came from a specific transaction, such as sale of a house, inheritance or gift, you must prove that the transaction occurred by providing an official document, such as a closing statement or contract or other official documents.