USCIS recently posted a notice that they are now accepting applications
for naturalization from qualifying members of deceased service members
at their Nebraska Service Center (NSC). All eligible applications that
are received at the NSC will be handled by a team dedicated to
processing these types of applications.
Spouses, children and parents of a deceased service member who was a
citizen (even those who received citizenship after they passed away)
and was serving honorably in active duty at the time of their death may
submit their Applications for Naturalization (Form N-400) to the NSC at
one of the following two addresses:
U.S. Postal Service Deliveries
Nebraska Service Center
PO Box 87426
Lincoln, NE 68501-7426
Express Mail and Courier Deliveries
Nebraska Service Center
850 S. Street
Lincoln, NE 68508
Members of the military seeking naturalization (and their spouses)
should also submit their Applications for Naturalization to the
applicable address listed above.