My girlfriend became a GC holder when she was much younger (around 12 or so) but her parents cannot find the original documentation. She needs to know the original date that she became a GC holder in order to properly fill out her N-400. However, when she contacted USCIS they said they could not give her that information over the phone. Instead, she had to go to the city immigration office. Has anyone else run into this problem? Was it just a USCIS agent giving her incorrect info, or will she have to visit the city immigration office?