Grandparents Raising Children Support Group
This community is dedicated to grandparents who are the primary caregivers of their grandchildren. In cases where the parents are not willing or able to provide adequate care for their children, grandparents may take on the role of primary caregivers. Join the support group to find support, share your experience, and get advice from other members.
I found this link for Nebraska:
http://dhhs.ne.gov/publichealth/pages/ced_bicert.aspx
You'd have to go to your local Social Security office for the card (unless you already have the number. In most cases, that's all that's needed.)
Hope that helps!