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N-400

Application for Naturalization

For an eligible permanent resident to apply for U.S. citizenship.

How to check

Have your Receipt Notice ready and use these fields so the result matches your case.

  1. Select the formN-400
  2. 2Select the eligibility category

    A form may have several eligibility categories. Match the category to your receipt and filing type.

  3. 3Select the processing office

    Use the office on your receipt notice. An IOE prefix usually does not identify the processing center by itself.

  4. 4Compare your receipt date

    Check the official Case inquiry date. If your receipt date is earlier, you may usually try an outside-normal-time inquiry.

We do not store time estimates. The link opens the current data available from USCIS.

A free public reference tool. Not legal advice or affiliated with the U.S. government.Verify with official USCIS information
N-400 Application for Naturalization | USCIS Processing Time Reference