Can someone please tell me the purpose of an EAD. I have read that you can not work unless you have a social security number also. But on USCIS website it says that Employment Authorization Document LIST A can be used for identity and employment verification. Is this not the same as an EAD? Seems if you need a Social Security Number PLUS an EAD, seems the EAD would be pointless as long as you have the Social Security Card. Seems like getting a Driving License and not using it to be able to drive. Can someone please help me understand this?