for US Citizenship?
What can I do if I cannot present my child's foreign birth certificate?
in that case we will consider other documents such as your child's passport or a document issued by the DHS Department of Homeland Security as evidence of your child's age.
Also, for what kind of original documents do  I require?. And what will happens if I haven't yet developed my citizenship?
You can give as proof of your U.S. citizenship documents like your U.S. birth certificate or your U.S. passport.
What if I don't have some of the required documents?
We'll ask you for any other document that can identify you correctly. Like your employee Id card.
What should I do to change my name on my Social Security card?
You'll have to provide evidence of your legal name change. You can use documents like your marriage document to prove this.
Can I muse an expired document as proof of identity?
no, the documents you use must be current, not expired.
and photocopies of the original documents?