Since it is so difficult to find Experian's address for mailing your disputes, (most links inlcuding http://www.myfico.com/crediteducation/questions/error-on-credit-report.aspx) only have an online link, I am posting this link from CFPB which has their address for the benefit of other users.
http://www.consumerfinance.gov/askcfpb/314/how-do-i-dispute-an-error-on-my-credit-report.html
Experian
Online: www.experian.com/disputes/main.html
By mail: Use the address provided on your credit report or mail your letter to:
Experian
P.O. Box 4000
Allen, TX 75013
By phone: Phone number provided on credit report or (888) 397-3742
