Form N-644 | Application for Posthumous Citizenship

Form N-644 | Application for Posthumous Citizenship

Purpose of Form

There are a lot of non-US citizens who fight and die for the US as members of the US Armed Forces. The government of US appreciates their contribution to the military success of our country, that’s why people who died during the active duty with the US armed services or whose death is tightly bound with injured or diseases, which they get during this period, can get the status of citizens of the US. However, Posthumous Citizenship is just an honorary status, which doesn’t give any immigration privileges for relatives.

Special Instructions

If you want to use this way to get US citizenship, you should file USCIS form N-644 (Application for Posthumous Citizenship). If your application is submitted, you will get a Certificate of Citizenship. 

Common filing mistakes

  • Using an outdated USCIS edition of the form.
  • Leaving required fields blank or mixing typed and handwritten answers inconsistently.
  • Forgetting the signature, supporting evidence, or the correct filing fee.

Official USCIS Update

USCIS can change filing addresses, fees, and accepted editions without notice. Use the official links below before filing.

Current edition: 04/01/24

Verified: 2026-05-21

Filing fee: You can find the filing fee for Form N-644 by visiting our Fee Schedule page.

Where to file: Mail your completed N-644 application to the California Service Center.

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See also

Download the form N-644Read more
Do I Have to Show Proof if My Citizenship Paper Got Lost or Taken?Read more
Form N-600K | Application for Citizenship and Issuance of Certificate Under Section 322Read more
How Much Time Do You Need to Obtain US Citizenship?Read more
Overview of Key USCIS Forms and Their Costs for Green Card and Citizenship ApplicationsRead more
Preparing for the U.S. Citizenship Oath Ceremony: An Overview of the Final Naturalization StepRead more

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