父母绿卡收到半年了，现在USCIS来信说是发错了，还要出生证明。60天之内不给证明就撤回绿卡。
This letter shall serve as notice that it is the intention of the USCIS to revoke the Petition for Alien Relative (Form 130) filed by you in behalf of the beneficiary, on ....
It has now come to attention of this office that your petition was approved in error.
怎么会有这种怪事！
去年申请130时，把93年国内做的出生公证给了，后来又按补充材料要求给了医院证明，户口本。。。天，还要什么证明？
现在国内能补做 BIRTH CERTIFICATE？
高手们给出出主意，我该怎么办？还是把像类似这样的出生公证给寄过去？
http://www.51ielts.com/dispuker.asp?num=25524
谢谢