The documents you will need will depend on whether your son is a U.S. born citizen or a foreign born citizen.
He is a U.S. citizen, but what documents do I need to verify this with Social Security?
ITo verify your son's citizeship, we will need to see a U.S. birth certificate or an U.S. passport.
Will this prove his identity?
Yes, this will prove your son's identity.
What if his citizenship has already been established with Social Security?
In this case, you would not need documentation.
Is your reason for obtaining a new card for your son because of a legal name change?
No, his name has not changed.
I think his identity has already been verified with Social Security, but if it's not, are there any other documents I can use besides a passport or birth certificate?
If you do not have these identity documents, we can also accept a state issued ID card or an adoption decree.
What if his ID card is in his prior last name? Will it still be accepted?