My wife is a USC and plans to petition her brother (Beneficiary) using form I-130. There are a few questions I have about what to send with the form and Beneficiary family members. When assembling the I-130, should only the primary Beneficiary's documents be submitted? Meaning the Birth Certificate of the Brother. Or should the documents of all persons listed in the Beneficiary section (Part 4) be submitted? If only submitting the Beneficiary's documents initially with the I-130, when should the documents of the Beneficiary's family be submitted? Thanks in advance !