Form N-600 (Application for Certificate of Citizenship) is a form issued by the United States Citizenship and Immigration Services (USCIS) that has to be filled and submitted if you have become a US citizen through your parents or by the action of law. You will be provided the US citizenship certificate after you file the form N-600.
There are a number of documents that have to be submitted along with the form N-600. These include copies of your birth certificate, passports, and naturalization or citizenship certificate of your US citizen parent(s) (if required). You may be asked for additional documents, depending on your case.
If you have filed an application without submitting the fee, your application will not be entertained. There is a specific fee that you must pay before mailing your application. Many applications are rejected just because the applicants fail to deposit the fees. You can use money order or check to pay your fee. Some applicants are exempted from form filing fees, such as US veterans and armed forces personnel. However, they must pay the fee if they are filing Form N-600 for their children.
You can also fill and submit Form G-1145 together with the form N-600. The Form G-1145 is basically for electronic notifications about the status of your application. When you file this form, you will get text messages or emails about the status of your Form N-600. You can find and fill the Form N-600 online; however, you must send the completed form to the USCIS Phoenix Lockbox facility.
If you are using US Postal Service (USPS), you must send the Form N-600 on the following address:
P.O. Box 20100
Phoenix, AZ 85036
On the other hand, if you are using USPS Express Mail/Courier, you must send the Form N-600 on the following address:
Attn: Form N-600K
1820 E. Skyharbor Circle S
Phoenix, AZ 85034
Build your new life in the U.S.