Can I apply for citizenship while my I-751 application is pending?
If you meet the following criteria, you can file an application for naturalization even if your I-751 petition for removal of conditions is still pending with USCIS.
Naturalization
How soon can I apply for naturalization after becoming a permanent resident?
You cannot apply for naturalization yet. You must be a permanent resident for a certain number of years and be in “continuous residence” before you may apply for naturalization. To be eligible for naturalization, you must satisfy the following conditions.
What can I do if I lose my certificate of naturalization?
If you do not have a U.S. passport or certificate of naturalization, you will have to submit Form N-565 to apply to replace your certificate of naturalization. In the meantime, if you have a copy of your original certificate, you can provide that to your new employer along with proof of filing Form N-565 or receipt notice so they know that the request for a replacement is in process.
I have a disability; do I still have to take the English and Civics tests for naturalization?
If you can satisfy the English and civics requirements for naturalization with reasonable accommodations, then yes, you still have to take both tests. USCIS will make every effort to make reasonable accommodations for applicants with disabilities.
How can a minor child renounce U.S. citizenship? 
A U.S. citizen who is under 18 years of age may apply to renounce her U.S. citizenship. She will have to convince a U.S. consular officer that she understands the consequences of renunciation and that she is renouncing her U.S. citizenship of her own free will.
Can I become a U.S. citizen if I did not register for the Selective Service? 
Depending on your age, your application to become a U.S. citizen may be affected by your failure to register for the Selective Service. If you are a male over the age of 31 years old, failure to register for the Selective Service will not affect your application. However, if you have failed to register for the Selective Service, and you are a male between the ages of 26 and 31 years old, your application to become a U.S. citizen will be difficult. If you are under 26 years old, you still have time to register for the Selective Service and avoid the negative consequences of failing to register.
What is the difference between being a U.S. Citizen and a U.S. lawful permanent resident?
U.S. citizens can apply for more types of relatives to immigrate to the U.S. than permanent residents. A permanent resident can apply for his or her spouse and unmarried children to obtain U.S. green cards. A U.S. citizen may apply for each of the following family members to obtain U.S. green cards: (1) fiancé(e), (2) spouse, (3) children (unmarried and married), (4) parents, and (5) siblings.
I am a U.S. citizen. My child was born outside the U.S. Is my child a U.S. citizen? 
A child born outside the U.S. acquires U.S. citizenship at birth if the U.S. citizen parent has been physically present in the U.S. for five years prior to the child’s birth. If you are a U.S. citizen and your child is born outside the U.S., you must apply for a Consular Report of Birth Abroad (CRBA) at the nearest U.S. embassy or consulate. The CRBA is proof that your child is a U.S. citizen, but it does not take the place of a passport for travel purposes.
Who can apply for a naturalization fee waiver?
If your family income is below a certain level or if you satisfy other conditions, you can apply to waive part or all of the USCIS filing fee when you apply to naturalize as a U.S. citizen. The normal USCIS naturalization filing fee is $640 plus an $85 biometric fee for a total of $725.