Passports, birth and marriage certificates establishing the family relationships, each person's U.S. travel and admission history including any refusals, police or court records where relevant, and the education and employment records that support eligibility under the connected employment-based category.
Assemble admissibility and relationship evidence per person
Because vetting and the connected immigrant category apply to each person individually, the family's file should be organized by person rather than as one household bundle. For each of the couple and the son: a valid passport, prior passports covering the last several years of U.S. travel, records of any U.S.
visa applications or refusals, any arrests or convictions with court dispositions, and evidence of current residence and employment. For the family relationships: the marriage certificate and the son's birth certificate. For the connected employment-based category: degrees, transcripts, professional licences and employment letters that would support the applicable eligibility, since the official page connects successful cases to that category rather than replacing its requirements.
Keep a dated copy of the official program page and FAQ alongside, and record the account or registration confirmation and every receipt. Documents in another language need certified English translations. A file built this way lets the family answer any later question about who paid what, on which terms and for whom.