Here is a verified list of the three major credit bureaus, including their mailing addresses, phone numbers, and official websites: 1. Equifax Mailing Address (Disputes): Equifax Information Services LLC P.O. Box 740256 Atlanta, GA 30374 Phone: 1-800-685-1111 Website: https://www.equifax.com 2. Experian Mailing Address (Disputes): Experian P.O. Box 4500 Allen, TX 75013 Phone: 1-888-397-3742 Website: https://www.experian.com 3. TransUnion Mailing Address (Disputes): TransUnion LLC Consumer Dispute Center P.O. Box 2000 Chester, PA 19016 Phone: 1-800-916-8800 Website: https://www.transunion.com These are the official consumer dispute contact details commonly used for mailing credit dispute letters.