A lawsuit is moving forward alleging Chicago‘s fines for city stickers and other tickets are illegal.

A circuit court judge granted class action status to the lawsuit Wednesday.

The lawsuit accuses the city of exceeding the maximum $250 fine by tacking on fines and late fees totaling up to $400. Lawyers reportedly plan to ask a judge to refund any illegal fines back to the drivers.

It appears anyone who had to pay these kinds of fines could get that money back because of the lawsuit. Lawyers said the refunds could potentially amount to hundreds of millions of dollars.

Any driver who received a ticket from the City of Chicago’s Department of Administrative Hearings that exceeded $250 anytime between 2010 until the present day, is part of the case and doesn’t need to do anything to receive money back.

A process is currently underway to identify all of those who were impacted.