Home  »  Knowledge base  »  What documents do I need to prepare my N-400 citizenship application?

The U.S. citizenship application, officially known as Form N-400, Application for Naturalization, is one of the longest and most complex USCIS forms. It has 20 pages. Note that minor mistakes and incorrect information in your Form N-400 can cause costly delays and rejections, so be accurate.

When preparing Application for Naturalization it’s helpful to have the following documents on hand:

  • Permanent Resident Card (green card);
  • Social Security number (if you have one);
  • Travel dates and details (if you traveled abroad, have the dates of each trip);
  • Selective Service registration information (if applicable);
  • Residential address info (your address information for the past 5 years);
  • Job and/or school information for the past 5 years;
  • Contact information for your current and former spouses (if applicable);
  • Contact information for your children (if applicable).

 

Also read:

When does my time as a permanent resident begin?

If my green card expires, can I still apply for naturalization with Form N-400?

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