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女儿有绿卡，现有白皮书回美证。 在国内已呆快满两年。 现准备续回美证。 1）需要重新打指纹吗？-Yes。

. 2）可以提前多长时间申请？-Up to 120 days before the old card expires。

3）一般递交申请后， 大概多长时间要求打指纹？

-Normally about one to two months. But she may request expedited biometrics apointment which takes about 10 to 14 days. See:

http://lawandborder.com/guam-or-honolulu-bound-biometrics-appointment-options-for-reentry-permit-applicants-living-overseas/