我是美国公民，. 准备为弟弟申请移民，填I-130 时，online，
要不要attach 我和弟弟的关系. 按照I-130 的instruction
-You need to provide the copies of both your birth certificate and your brother's birth certificate to prove the sibling relationship (i.e., both of you have the same parents in the birth certificates).
要提供我们俩的出生证明. 我们都以前都没有的，如何证明.
-Your birth certificate was required when you applied for your green card, right? How did you get your green card if you did not provide your birth certificate?
Your brother may ask 国内当地派出所出个证明，然后去公证处作个公证。
