从官方网站上找到如下信息， 貌似就不需要给孩子file N600了， 但是又说以下这些情况下会和你要公民纸，请大家给出出主意吧， 谢谢。
- Social Security benefits
- State issued ID including a Driver’s License or Learning Permit
- Financial Aid
- Employment
- Passport Renewal
How do I get proof of my U.S. citizenship?
I was born overseas. After I was born, my parent(s) became naturalized U.S. citizens. Could I have derived U.S. citizenship?