I've made several FOIA requests...also helped friends with theirs...entered passport and other data, but never attached anything. The entry reports still came through. (All the requestors were U.S. citizens, so that may have made things easier.) Of course, attaching copies of your passport, etc. won't hurt, but I don't think it's a requirement. If your last request was rejected, you likely omitted some important piece of information. Also, you have to be specific about what you're requesting, such as "I request a record of my entries into the United States from January 1, 2011 thru January 1, 2015."