Some of the SS cards are forged. But recently, most states now accept the Matriculas Consulares card which is issued by the Mexican consulate. These "ID" cards are about as usless and legal as the paper they are printed on.
In states that accept the Matriculas Consulares card, illegals can open checking accounts without a SS number. Wells Fargo Bank and several other national banks now accept them. Also illegals can obtain a drivers license with them. This makes them eligible to vote under Motor Voter.
In Texas I have to give my SS number to get a drivers license, but if I had a Matriculas Consulares card I would not need a SS number.
There is one set of rules for them and another set of rules for us. The bar is being lowered for illegals and raised for us.
Your government at work!! I hope that answered your question. I will look for some links to send you.
Money in the bank:Accountants helping wary immigrants park cash safely, send it home.