Dear Liz: I have been doing everything to raise my credit scores, which were horrible. I see some medical bills on my credit reports that seem identical. Should I try to dispute them or just let them go? I heard that if you try to dispute them, it allows the creditor to restart the clock on paying them, potentially keeping them on your report for seven more years.

Answer: You heard wrong, fortunately. Disputes don’t extend the limit on how long negative information can be reported.

You may be confusing the seven-year credit reporting time limit, which is part of the federal Fair Credit Reporting Act and restricts how long negative information stays on a credit report, with state statutes of limitation.

Statutes of limitation are supposed to limit how long a creditor may sue you over a debt. (The key phrase is “supposed to.” Collectors do file lawsuits on debts that are too old, hoping that the debtor won’t show up in court to point that out.)

Statutes of limitation can range from two to 15 years, depending on the state and the type of debt. In some states, it’s possible to restart the statute of limitations by making a payment on a debt, or even acknowledging that the debt is yours. (In California, the statute of limitations is four years for most debts.)

You’ll want to avoid either until you’re sure the bills are correct. You can start by disputing the bills with the credit bureaus.

If that doesn’t remove the duplicates, you can contact each collection agency in writing. Ask them to validate that the unpaid bill actually belongs to you and that they have the right to collect. Mention that if they cannot validate the debt, you want the bill removed from your credit reports. Also ask the collector to respond to your letter within 30 days.

Removing any duplicates may help your scores. Actually paying the collections typically won’t. It’s up to you whether you want to try settling the debts and risk reviving the statute of limitations, or simply wait until the debts fall off your credit reports after the seven-year mark.