The FTC's most cited finding on credit reports — that roughly one in five U.S. consumer credit reports contains an error of some kind — is correct but slightly misleading without context. Errors are common. Errors that meaningfully affect your credit score and cost you real money are less common. The distinction matters because most consumers, when they finally read their reports, find some small inaccuracy and either panic about it or dismiss the whole exercise.
The honest framing is that there are five common categories of credit report error, and they vary widely in their impact. Some can drop a score by 80 to 100 points. Others have no effect on the score at all but should still be corrected for the integrity of the file. Knowing which category you are looking at, and which subsection of the Fair Credit Reporting Act applies, is what determines whether the dispute is worth the effort.
Here are the five most common categories, ranked roughly by frequency and dollar impact, with the FCRA basis for each.
1. Mixed Files and Mis-Attributed Accounts
The most damaging single category of credit report error is the mixed file: when a credit bureau combines information from two different consumers into one report. This typically happens to people with common names, similar Social Security numbers, or family members who share an address. The credit bureau's matching algorithm decides that account information from another person belongs in your file, and suddenly you have someone else's debts, late payments, or collections showing up on your report.
Mixed files are statistically rare but devastating when they happen. A single misattributed collection account can drop a credit score by 80 to 100 points. The dispute under 15 U.S.C. § 1681i(a)(1) is straightforward in concept — the account does not belong to you — but the bureau will typically require documentation: your driver's license, proof of address, and sometimes a sworn affidavit. The dispute should explicitly state that the account belongs to another consumer and that the bureau has improperly merged files.
The CFPB has flagged mixed-file errors as one of the most persistent FCRA compliance issues among the three major bureaus, and there is well-developed case law on the subject. The Eleventh Circuit's decision in Williams v. First Advantage LNS Screening Solutions affirmed substantial damages against a credit reporting agency that failed to correct a mixed-file error. The legal foundation for these disputes is strong.
Dollar impact: very high. A consumer who removes a misattributed collection can see a score increase of 50 to 100 points, which translates to thousands of dollars a year in lower interest rates and lower insurance premiums.
2. Re-Aged Debts and Outdated Items
Under 15 U.S.C. § 1681c(a), most adverse information must be removed from a credit report seven years after the date of first delinquency. Chapter 7 bankruptcies have a ten-year limit. The clock starts running on the date of the original delinquency — not the date the debt was sold to a collector, not the date a new collector started reporting, not the date the consumer made a partial payment in an attempt to settle.
Re-aging is what happens when a debt buyer or collection agency reports the same debt with a more recent date of first delinquency to extend its presence on the report. Sometimes the date is reset accidentally when an account is transferred. Sometimes it is reset deliberately. Either way, the consumer's report shows a derogatory item that should legally be removed, and the difference between the actual date of first delinquency and the reported date can be the difference between an active negative item and a removed one.
Disputes against re-aged debts cite § 1681c(a) with reference to the actual original delinquency date. Documentation helps — a statement from the original creditor showing the actual delinquency timing, or a prior credit report showing the item with the correct earlier date. If documentation is not available, a Method of Verification request under § 1681i(a)(6)(B) demanding the bureau disclose the date used and the source can produce the same result.
Dollar impact: high. Items at the seven-year mark are often the older derogatory items that account for the largest score drag in a consumer's file. Removing them disproportionately moves the score.
3. Duplicate Reporting
When a debt is sold from the original creditor to a collection agency, the original account should be updated to reflect the transfer — typically with a zero balance and a status of "transferred" or "sold." The collection agency then opens a new account showing the debt with their company as the creditor. Two trade lines for one debt, but only one of them counts as an active balance.
What frequently happens instead is that both accounts show active balances. The consumer sees, effectively, the same debt listed twice. This affects credit scoring in two ways: it makes the debt look larger than it actually is (artificially inflating reported credit utilization and total debt), and in some scoring models it is counted as two separate derogatory items rather than one.
The dispute under § 1681i(a)(1) cites the duplication and requests that the original creditor account be updated to reflect the transfer (zero balance, status changed). The collection account remains, with the correct balance. The total derogatory impact on the report drops by half for that item.
Dollar impact: moderate. The score effect is real but typically smaller than mixed files or re-aged items. The cleanup makes the file more accurate without producing a dramatic score jump in most cases.
4. Late Payments Incorrectly Reported
A single 30-day late payment reported on an otherwise clean credit file can drop a FICO score by 60 to 110 points, depending on the rest of the profile. Higher-tier consumers with no prior derogatory history are hit hardest by a first late payment because the relative deviation from their established pattern is greatest.
Common causes of incorrect late payment reporting include: payment received on time but processed after the cycle close date; payment made on the day of statement close that the system did not credit until the next day; payment made on a holiday or weekend that did not post until the next business day; and split or partial payments where the system credited only a portion to the current cycle. Each of these can produce a "30 days late" mark that does not reflect the consumer's actual payment behavior.
Disputes against incorrectly reported late payments cite § 1681i(a)(1) and provide documentation: the payment confirmation, the bank statement showing the debit on or before the due date, or the original biller's payment posting record. If the documentation is solid, the bureau is required to correct the payment history. Once corrected, the score often recovers most of the lost points within the same scoring cycle.
Dollar impact: high if recent, moderate if older. Recent late payments weigh more heavily in FICO models. A late payment from three months ago weighs much more than the same late payment from three years ago. Correcting a recent incorrect late mark can be one of the highest-impact dispute outcomes possible.
5. Personal Information Errors
The most common error overall — not in dollar impact, but in raw frequency — is incorrect personal information. Misspelled names, old addresses still listed as current, employers from a decade ago, phone numbers that have not been active for years, variant Social Security numbers, and former married names appearing as aliases.
Most personal information errors do not directly affect the credit score. The scoring model uses account behavior, not the consumer's name or current employer. So a misspelled name does not, by itself, cost the consumer points. But personal information errors can become the leading edge of a mixed-file problem, because the credit bureau's matching algorithm uses name, address, date of birth, and Social Security number to decide which accounts to attribute to which consumer. An old variant of the consumer's name still active on the file can pull in accounts that actually belong to someone else.
Disputes against personal information errors cite § 1681i(a)(1) and request specific corrections: remove the incorrect spelling, remove the outdated address, remove the variant Social Security number, remove the former employer. The bureau is required to update the file. The score does not move immediately, but the integrity of the file improves and the risk of future mixed-file mistakes drops.
Dollar impact: indirect. The cleanup matters for file hygiene and to prevent future errors, but the immediate effect on the score is usually nil. Worth doing, especially because the disputes are typically uncontested.
Triage: Which Errors to Dispute First
If you read your credit reports and find multiple potential errors across categories, dispute them in order of dollar impact. Lead with the items most likely to move the score. Save the personal information cleanup for last.
Mixed-file errors and recent incorrect late payments go first. They produce the largest score movement when corrected, and the dispute foundations are typically strong because there is clear documentation supporting the consumer's claim.
Re-aged debts and outdated items go second. The score impact is high, but the dispute can take two or three rounds — initial dispute, Method of Verification request, follow-up dispute — because the bureaus often defend re-aged dates with whatever the furnisher reports. Persistence is required.
Duplicate reporting goes third. The score impact is moderate but the dispute is typically straightforward because the duplication is easy to demonstrate from the report itself.
Personal information cleanup goes last. It does not move the score but improves file hygiene and reduces the risk of future mixed-file errors.
The One in Five Number, in Context
The FTC's one-in-five number bundles together every type of error in this article — from misspelled middle initials to mixed files that drop scores by 100 points. About half of the errors found in their landmark study had measurable impact on the consumer's credit score, and roughly one in twenty errors was severe enough that correcting it moved the consumer into a different credit tier.
Translated: most credit reports have a small error somewhere. A meaningful subset of those errors actually costs the consumer money. And a smaller subset are dramatic enough to be life-changing when corrected. The work of figuring out which of those tiers your specific errors fall into is the work of reading your reports carefully and filing the right disputes.
How CreditRefresh Categorizes Errors
CreditRefresh pulls your credit reports from all three bureaus and categorizes potential errors against the categories above. Mixed-file candidates, re-aged debts, duplicate entries, late payments that look incorrect against your payment history, and personal information variants are all surfaced separately so you can see which items are likely to move your score and which are file-hygiene cleanup.
Each disputable item gets an item-specific letter drafted with the right FCRA subsection cited, the specific factual basis identified, and the requested correction stated. You approve the items to dispute. The 30-day clock starts.
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Results may vary. No specific outcome is guaranteed. CreditRefresh disputes inaccurate, unverifiable, or improperly reported information — not accurate items. This article is for informational purposes only and is not legal advice. For legal questions, consult an attorney.