How to File an Application with USCIS

The United States Citizenship and Immigration Service (USCIS) has numerous applications and processes that differ, depending on individual circumstances. Specific instructions for filing USCIS applications vary, based on the status an immigrant is applying for and the particulars of each case. However, some basic instructions apply to all applications.

1. Determine the proper form for the appropriate application process. For example, naturalization typically requires a form N-400, while Green Cards have different applications for immigrants already in the country and those not yet within U.S. borders. In some cases, immigrants must file forms with the Department of State for visas and other permissions prior to filing an application with the USCIS.


2. Obtain the forms necessary for a given application. Forms are available online via PDF download, by mail and by phone. Some community-based organizations also provide forms.


3. Read the accompanying instructions and gather any required documentation. Certain forms require different documents, such as birth records, work contracts, offers of employment, letters of recommendation and others.


4. Complete the form and submit it to USCIS with its associated fees. Most forms can be mailed in, although some may require in-person filing. The instructions included with each application will list specific locations and fees required. If a form cannot be mailed in, the instructions will provide any necessary information for filing the application.

Although the process of filing an application with the USCIS is fairly straight forward, be sure to verify the proper filing process. Incomplete or improperly addressed applications are typically returned, thus delaying the process. The proper fees and any necessary accompanying documents must also be included with the application. Insufficient fees or missing documents can also delay an application or result in the rejection of an application.