I'm sorry for the typo. Yes I meant FS.
I know what the FS-240 is.
I even gave you the CBP link to their recognition of that as a form evidence of US citizenship.
I know that is what you used to get his his baby passport and SSN.
What I am asking you now is whether he has a valid driver license and SSN card.
I am trying to help you.
The problem is he has to complete the I-9 to start work and it only allows certain documents per the USCIS regs and they do not have the FS-240 on the list
HOWEVER, he can present his valid state driver license as a form of verifying his identity
And he can present his SS card as evidence of his right to work
That would resolve the issue.
I have no way of knowing if he has these two documents so he can complete the paperwork to go to work.
Now if the contractor has something in writing from the CBP that they may only hire US citizens, your son needs to refer them to the CBP website to show that this is satisfactory evidence of his US citizenship
AND provide them the valid unexpired driver license and SSN card as evidence of his identity and work authorization.
I get that you are frustrated but not answering my question is not giving me the info I need.