Can you request immigration papers? I have no idea, but I know you can request military files. I read somewhere when I was doing genealogy that a lot of immigrants back in the 1800s, when my relatives came over from Germany, didn't know how to spell their names. So the workers at Ellis Island just spelled them how they sounded, so you always have to do phonetic searches because the same person's name might be spelled differently, depending on who was filling out the documents. For example, the name Miller, was originally Möeller, but because we don't have the ö and it sounded closest to Miller or Muller, that's how it was spelled. So in some documents, it might be spelled one way, and in another in a different place. Osborne/Osborn/Osburn/Osbourne is another one that is commonly spelled several different ways.