A mixed file is when a credit bureau combines another person's information, such as accounts, addresses, or public records, into your file, usually because of similar names, Social Security numbers, or addresses. It can be disputed under the FCRA.
Credit bureaus do not receive your data in a single labeled folder. Lenders, collectors, and courts send millions of records, and the bureau’s matching system decides which file each record belongs to. When that system attaches someone else’s information to you, the result is a mixed file (sometimes called a merged file).
Common causes
- Similar or identical names, especially common names.
- Family members with the same name, such as Jr. and Sr., or twins.
- Social Security numbers that differ by one or two digits.
- Shared or similar addresses.
- Matching on partial information when a furnisher reports incomplete identifiers.
Signs you may have one
- Accounts, collections, judgments, or bankruptcies you do not recognize.
- Names, addresses, Social Security numbers, birth dates, or employers that are not yours.
- Inquiries from companies you never dealt with.
- A report that looks different at one bureau than at the others.
What the law requires
Bureaus must follow reasonable procedures to assure maximum possible accuracy of the information about the individual a report relates to (15 U.S.C. § 1681e(b)). Attaching records to you based on a similar name alone, without checking identifiers like Social Security number and date of birth, is a common cause of mixed files and a frequent subject of disputes under this standard.
When you dispute mixed information, the bureau must reinvestigate within 30 days and delete or modify what is inaccurate or cannot be verified (§ 1681i).
What to do
- Get your full file from each bureau (§ 1681g) so you can see every identifier and account.
- Dispute each item that is not yours, and each wrong name, address, SSN, and birth date.
- Include proof of identity and proof of address, and explain that the information belongs to another person.
- Recheck after the dispute. Mixed information can reappear if the underlying matching problem is not fixed.
For more, see mixed credit file attorneys and how to fix a mixed credit file. Mixed files can be hard to fix through disputes alone; a free case review can help you evaluate your options, with no fee unless we win.
Related
- Mixed file cases
- How to Fix a Mixed Credit File: A Step-by-Step Guide
- How to Dispute Credit Report Errors With Equifax, Experian and TransUnion
Sources
- 15 U.S.C. § 1681e(b) — Accuracy of report (Cornell LII)
- 15 U.S.C. § 1681i — Procedure in case of disputed accuracy (Cornell LII)
- 15 U.S.C. § 1681g — Disclosures to consumers (Cornell LII)
- FTC — Disputing Errors on Your Credit Reports
Updated November 2026. This page is general information, not legal advice.