Haley's Paperwork II

So, it seems that we got some of her information from the other family.  They are still holding pertinent information.  This information may be needed to get her citizenship paperwork and social security.  I just don't get why someone would hold information that has nothing to do with their life or their families.  They gave up their rights over her.  In doing so, they should relinquish her information.  That is a part of her history and a timeline of her trip from China to America.