Below was my hasty cover letter for my N-400, my Application for Naturalization. It also shows the kinds of documents and requirements I submitted. My eligibility for citizenship was based on my three- year marriage to my US citizen husband.
USCIS
1820 E Skyharbor Circle S., Floor 1
Phoenix, AZ 85034
February 21, 2009
Dear Sir or Madam:
Enclosed please find [...]