No problem, are you a U.S. born adult that changed your name because of marriage, divorce, court order, or other reasons?
Yes, I got married.
Congratulations on your marriage! You will need to tell Social Security to get a corrected card.
My concern is that I haven't previously established his U.S. citizenship before, what documents or paperwork do I need to do this?
We will need to see proof of U.S. citizenship.  Just so that you know, we can only accept certain documents.
Ok. I want to change his name on his Social Security card, do I need certain documents for that?
Yes, you will need to show us proof of his legal name change or final adoption decree.
Do they need to be original documents?
Yes, we can only accept certain documents as proof of U.S. citizenship.
What if my son works?