Yeah, but still.. I don't understand why people take the risk and show up in DV interview without all the required documents.... without original documents, without notarized copies... - birth sertificate, high school or university diploma originals and notarized photocopies are usually required...
Winning the DV lottery is not like a visiting a friend the other day or visiting a movie theathre - it's a LIFETIME CHANCE TO GO TO USA. Myself, I had all the required documents, notarized documents and even more additional documents in case embassy employee or Consule asked for it. For additional safety, I even notarized required documents in two copies in case one becomes invalide. I also had the Interview fee in cash as well as ready ATM card in case money gets stollen/forgotten (the card was kept seperate from wallet).
I think Consule pays attention to all details, including how well are you prepared, how well are you organized and what's your attitude. Prepare well, have all the documents, have the right attitude, read about US/State taxes, places/neighborhoods... and you will be rewarded.