Send your FCRA dispute letter to the bureau that's reporting the error. Use Certified Mail with Return Receipt and enclose copies of your supporting documents.
Equifax Information Services LLC
P.O. Box 740256
Atlanta, GA 30374-0256
Phone: 1-866-349-5191
Online: equifax.com/personal/credit-report-services
Experian
P.O. Box 4500
Allen, TX 75013
Phone: 1-888-397-3742
Online: experian.com/disputes
TransUnion Consumer Solutions
P.O. Box 2000
Chester, PA 19016-2000
Phone: 1-800-916-8800
Online: transunion.com/credit-disputes