RFE first, because my application wasn't fully complete and I missed the letter of intent from my fiance. And since it was in RFE, I found a free template online to create letter from me and him. I printed his signed one he sent me scan of, but I also asked him to get it notarized. He went to court and got a 20 rupee stamp paper, and couriered it as well. So USCIS would have received 2 mails from us.