I disputed several erroneous items on my Experian credit report via USPS. I included my name, address, social security number, and date of birth on the correspondence to Experian. I also included a photocopy of my drivers license which validates my address and date of birth. Today, XXXX XXXX, 2015 I received a form letter from Experian stating " The social security number you gave us does not match the identification in our database.. Please send us proof of your social security number and this letter after you have completed all of the information. ''