Who Should Not File Form N-600?
5. You already filed Form N-600 and received a decision from USCIS on that previously filed Form N-600. USCIS will reject (not accept) any subsequently filed Form N-600. Review your Form N-600 denial notice for more information.
和8 CFR 320.5(c):
Subsequent application. After an application for a certificate of citizenship has been denied and the time for appeal has expired, USCIS will reject a subsequent application submitted by the same individual and the applicant will be instructed to submit a motion for reopening or reconsideration in accordance with 8 CFR 103.5. The motion must be accompanied by the rejected application and the fee specified in 8 CFR 106.2.
当然,你也可以直接不要Certificate of Citizenship;只申请美国护照就行了。Certificate of Citizenship又贵又没有什么用处是护照没有的。
还有,要确定一个东西:孩子是18岁之前拿到绿卡的,对吧?