Ok, so I thought I had resolved this issue a few months ago. I am a legal U.S Citizen and California resident and will be attending a UC school this fall. My mom does not have an Social Security number and this has created a big problem. A few months ago when I filled out my FAFSA application, I put her SSN number as 000-00-0000 and the application was rejecting that number and would not let me proceed saying that the SSN was invalid. So my teacher recommended me to put 999-99-9999 for my mom and it let me proceed and everything was fine. Now, I got an email today from FAFSA saying that my "Financial Aid Administrator (FAA) at your school has made corrections to your application". Now it's asking me to provide my mom's social security number. What do I do about this? What do you put down if your parent doesn't have an SSN? Also, it's asking for my Dad's SSN when I know nothing about him, and don't live with him. Do I have to provide his SSN too even though my mom never married him and I know nothing about him?