We have a child together and this is the evidence we are filing. Any ideas on whether it is enough?
• Copies of the passport and green card of alien resident;
• Copies of our daughter’s birth certificate,XX;
• Two original letters written and notarized by U.S. citizen friends, attesting to our relationship and marriage;
• Copy of joint tax returns that were filed for for 2005 and 2006;
• Copy of joint bank statements from 2005, 2006 and 2007;
• Copies of our joint car insurance policy.
• Copy of the title of our car, showing joint ownership.
• Copy of our American Express Card showing a joint account.
• A copy of our itinerary for a vacation that we took in December 2006.

Just wondering if you need more when you have a kid together?

Thanks everyone

I'd say that's perfectly sufficient. I submitted copies of the immigration paperwork (I-551, passport) and a sampling of bank statements, utility bills and our two apartment leases. (Actually, I couldn't find one of the leases and instead submitted the associated pet agreement... probably gave someone over there a good laugh)

You should have no problems with all the evidence you'll submit.