The statute of limitations is a time limit set by state law after which a creditor loses the right to use the courts to force payment of a debt. It's generally treated as a legal defense that the defendant must raise, rather than something that automatically stops a court clerk from accepting a filing.

That distinction matters: the law doesn't stop a time-barred lawsuit from being filed, it just gives the defendant a defense that, if properly raised, should result in dismissal.

Some collectors file suits on debts they know or suspect are time-barred, sometimes hoping the defendant won't respond at all or won't recognize that the limitations defense is available to them.

In other cases, the limitations period is genuinely disputed, often because of disagreement over when the clock started running, such as the date of last payment or the date the account was formally charged off.

The most important step is not to ignore the summons. Responding by the court's deadline and affirmatively raising the statute of limitations as a defense is generally necessary to get the benefit of it.

Gathering records showing the debt's origination date and any payment history can help establish exactly when the limitations period began and whether it has actually run.

Making even a small payment, or in some states simply acknowledging the debt in writing, can restart or extend the limitations clock depending on state law, which is why caution is warranted before contacting a collector about old debt.

Because these rules vary significantly by state and by the type of debt involved, reviewing your specific situation with a consumer law attorney or legal aid organization before responding is generally advisable.