I live in Chicago and my landlord is a large apartment rental/management company. What would happen if I break the 12-months rental lease by leaving 2 months early if they do not have my SSN on file? Would it hurt my credit? Prior to signing the lease I had to pay an insurance because I did not have an SSN prior to landing in USA. They never asked me for my SSN ever since. I could possibly be moving out of the city to another part of the USA so I am just curious what could be the consequences. Having a good credit score is very important to me so I just want to measure my risks and act accordingly.