http://uscis.gov/graphics/fieldoffices/nebraska/aboutus.htm#anchorMAIL
NOTE : If using overnight delivery by any private service provider, send your package to:
USCIS
Nebraska Service Center
850 S Street
P.O. Box (Insert Correct P.O. Box Number)
Lincoln, NE 68508
NOTE : If using overnight delivery by any private service provider, send your package to:
USCIS
Nebraska Service Center
850 S Street
P.O. Box (Insert Correct P.O. Box Number)
Lincoln, NE 68508