Use the actual ownership, closing, deduction and transfer evidence relevant to the proceeds.
Distinguish gross price from net funds
A listing price or accepted offer is not necessarily settled cash. Identify obligations paid at closing and who is entitled to the remaining amount.
Identity and travel documents, a complete personal history sufficient for background vetting, evidence of the lawful source of the funds to be gifted, and a preliminary assessment of EB-1 or EB-2 eligibility. Keep the application and fee confirmations, the USCIS instructions received, everything submitted through the official portal, records of the gift when instructed, and any correspondence about maintenance or transfer. Retain the relevant official terms, communications and payment records, with a clear connection to the sponsored employee and any later action. The immigration file holds civil records — birth and relationship evidence, identity documents, and anything issued through the applicable process — and it is the only one that answers immigration questions. The official USCIS instructions govern the supporting documents required in the case; these preparatory records help explain the actual funding arrangement rather than constitute a universal mandatory checklist. A passport may establish identity and nationality; a birth certificate may be relevant to chargeability; a marriage or birth record may support a claimed family relationship.