You need to prove U.S. citizenship
You must present your birth certificate  If one exists
What if one does not exists?
read if  a birth cerficiate does no exist
Do you accept  other forms of document if a birth certifiace does not exist?
I need a card for a u.s. born adult
It is important
What if I have lived outside the us for some time now?
We need original documents citizenship
What is I don't have original birth certifiate stating my age?