請教8老師，身份失效不超過180天在申請綠卡期間拿到回美證時可以用回美證回中國再來美國。身份失效超過180天卻隻能等到綠卡拿到才能回中國。這個官網上哪裏有寫嗎？
-There is 3-year bar if overstay is for > 180 days before filing I-485 and 10-year bar if overstay is > one year before filing I-485. Of course, this kind of bar will not apply to a person after getting green card holder.
如果他們回到中國時綠卡下來了，但綠卡郵寄到我這裏了，他們能拿他們手裏的回美證回來嗎？這個有官方說明嗎？
-There is 3-year bar if overstay is for > 180 days before filing I-485 and 10-year bar if overstay is > one year before filing I-485. Of course, this kind of bar will not apply to a person after getting green card holder.
如果他們回到中國時綠卡下來了，但綠卡郵寄到我這裏了，他們能拿他們手裏的回美證回來嗎？這個有官方說明嗎？
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