Keep the actual submissions, official communications, payment evidence and relevant case references.
Make the history reviewable
A short verbal summary may omit a request or prior answer. Reconcile the official record before sending new information rather than assume nothing was filed by the former adviser.
Identity and civil documents for every intended applicant, a complete personal history for vetting, evidence supporting whichever underlying immigrant classification is contemplated, and documentation of the funds. Identity and relationship documents for each person, evidence supporting the EB-1 or EB-2 category, proof of the source of the gift funds, and a dated copy of the official terms the family relied on. A dated copy of the official program page and any implementing action, the intermediary's written material and contract, written identification of the payee and instrument, and a list of questions official sources do not answer. The dated official page, the intermediary's proposal in writing, its written answers on regulation and refunds, and a receipt for every payment identifying the payee and the official instruction it responds to. Documents go through the official portal following the instructions issued after the application and fee, so prepare files to the stated format and treat any request to email them to an individual as something to verify first.