After completing your FAFSA, your father's date of birth in Item 63 does not match his date of birth in the Social Security Administration's (SSA) records for his SSN. 

If his SSN or date of birth is incorrect, you need to make a correction to the FAFSA.  If they are correct, your father should contact the SSA to make sure that they correct their records at 1-800-772-1213 or http://www.socialsecurity.gov.