The online retailer is issuing refunds to a small collection of U.S. customers who had issues with returns in the past. At least one customer’s return apparently dated back to 2018.

“Following a recent internal review, we identified a very small subset of returns where we issued a refund without the payment completing, or where we could not verify that the correct item had been sent back to us so no refund was issued,” Amazon spokesperson Maxine Tagay said in a statement sent to USA TODAY.

“There is no action required from customers to receive the refunds, and we have fixed the payment issue and made process changes to more promptly contact customers about unresolved returns going forward.”

Amazon is refunding a ‘very small subset’ of consumers for returns from past years. The decision comes amid a class-action lawsuit filed over the issue. A judge declined to dismiss it last month.