My father had been married to my mother for many years when they decided to separate. He then forged her signature on divorce papers in order to be able to marry his girlfriend and obtain U.S. citizenship for her and her children. They then decided to use my younger brother's SSN to take out a loan and to be the primary owner of a house. My brother wasn't even of legal age at that point and he recently tried to open a cell phone account but he was denied because he had "bad credit." This was the final straw, what do you suggest? What can be done? Please help.