I am sure you will need to provide more than the visa just to be safe. I've been in an out of school and haven't attended full time since 2009, but I have my graduation audit from my university as proof that I've been here along with my current cell phone bill, medical records and my high school diploma. I also have a notarized statement that I was physically present in the U.S. on June 15 and listed where I lived.

I'd send the I-94, gym records and anything else like bank statements and the order receipt for your online purchase. United We Dream said some of us are going to have to be creative about our proof.