Question: what documents do you need to apply for social security on line?
Answer: Proof of the child's birth. Original U.S. birth certificate, or Original U.S. Consular Report of Birth Abroad. ... 
Proof of the child's U.S. Citizenship. Original U.S. birth certificate, ... 
Proof of the child's identity. ... 
Proof of the identity of the parent signing the application.