For most of the 20th century, credit bureaus were closed shops — they kept files on you, sold them to lenders, employers, and landlords, and you had no way to even see what was in there. The Fair Credit Reporting Act (1970) cracked that open: you have the right to see your file, dispute what's wrong, and have inaccurate items corrected or removed.
Since September 2023, free weekly reports from all three bureaus — Equifax, Experian, and TransUnion — at AnnualCreditReport.com are permanent. Most negative information drops off after seven years; bankruptcies stay for ten. When you dispute something, the bureau has 30 days to investigate (45 if you send extra documents). If they can't verify the entry, they have to remove it. Your report decides whether you can get a loan, an apartment, or in many states even a job — it's worth checking.