USCIS Reference Guides and Forms


Reference Guides

Welcome to the USA website

An introductory website for patrons looking for general immigration information.

USCIS Citizenship Resource Center

  • Overview of the resources and information available through the USCIS website
  • Provides information specifically targeted to learners, teachers, and organizations
  • More information about the various training resources and classroom tools available through the Resource Center can be found here.

USCIS Electronic Immigration System

USCIS Customer Service Reference Guide

  • PDF chapters on a range of topics, including:
    • Benefits of immigration to employment
    • Programs for special populations
    • Nonimmigrant services
  • Frequently Asked Questions
  • Direct links to essential parts of the CIS website, such as:
    • Application processing times
    • List of doctors authorized to perform Immigration Medical Examinations.

The guide also includes key terms and contact information for further assistance.


 All USCIS forms

  • PDF format
  • Listed alphabetically by name, along with the form number, filing fee, and edition date.

For information about requesting forms via telephone, check out the Customer Service Reference Guide, “Need to Order Form”.

Selected USCIS forms
    • All U.S. employers must complete and retain a Form I-9 for each individual they hire for employment in the United States. This includes citizens and noncitizens.
    • On the form, the employer must examine the employment eligibility and identity document(s) an employee presents to determine whether the document(s) reasonably appear to be genuine and relate to the individual and record the document information on the Form I-9. The list of acceptable documents can be found on the last page of the form.

 I-130, Petition for Alien Relative

    • For citizen or lawful permanent resident of the United States to establish the relationship to certain alien relatives who wish to immigrate to the United States.
    • Note: A separate form must be filed for each eligible relative. USCIS processes Form I-130, Petition for Alien Relative, as a visa number becomes available. Filing and approval of an I-130 is only the first step in helping a relative immigrate to the United States. Eligible family members must wait until there is a visa number available before they can apply for an immigrant visa or adjustment of status to a lawful permanent resident.

 I-131, Application for Travel Document

    • To apply for a reentry permit, refugee travel document or advance parole travel document, to include parole into the U.S. for humanitarian reasons.

 I-140, Immigrant Petition for Alien Worker

    • To petition for an alien worker to become a permanent resident in the United States. (You may also file this form online.)

 I-485, Application to Register Permanent Residence or Adjust Status

    • To apply to adjust your status to that of a permanent resident of the United States.

 I-539, Application to Extend/Change Nonimmigrant Status

    • For nonimmigrants to request extensions of stay or changes from one nonimmigrant category to another nonimmigrant category. (You may also file this form online.) Please see the form's instructions for your specific nonimmigrant visa category.
    • This form also is used by F and M nonimmigrants seeking reinstatement of status; K-3/4 nonimmigrants requesting extensions of stay; and by persons seeking V nonimmigrant status while in the United States or an extension of stay as a V nonimmigrant.

 N-400, Application for Naturalization

    • To apply for U.S. citizenship.

 N-600, Application for Certificate of Citizenship

    • For an individual to document U.S. citizenship status based on citizen percentage.