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8老师您好，

我想问一下申请绿卡有什么材料是需要在国内办的？我搜了一下好像只有出生公证。我想问一下是不是只有这个需要在国内办。还有就是有没有时效性的要求，比如必须在提交绿卡之前的几个月之内提供才是有效的。

-The requirement for the documents is different based on the immigrant category. So, you had better Google to find more information based on your immigrant category. Of course, birth certificate is needed no matter what category is and it is valid forever.

谢谢！