Sony’s merchandise venture Ceremony of Roses has filed a lawsuit to stop bootleggers from selling fake Dua Lipa merchandise during her Radical Optimism Tour.

The case is the latest move in a growing effort by official tour merch retailers to shut down counterfeit sellers outside concert venues.

According to the filing, a group of unnamed counterfeiters has been breaking federal trademark law by offering unauthorized T-shirts and other items near arenas where the pop star is performing.

“The tour has just begun, and so have defendants' infringing activities,” wrote Ceremony of Roses’ attorneys, Bradford and Burns.

“The infringing merchandise that defendants sell is generally of inferior quality. The sale of such merchandise has injured and is likely to injure the reputation of the artist, which has developed by virtue of her public performances and the reputation of the plaintiff for high-quality authorized tour merchandise.”

The Sony-backed company is asking the court to grant an order allowing officials to seize and confiscate the counterfeit goods throughout the US leg of the tour, which wraps up on 16 October in Seattle.

Bradford and Burns have been leading a series of nearly identical lawsuits on behalf of official merchandise companies. Just last month, the pair filed two cases, one for Ceremony of Roses and another for Live Nation subsidiary Merch.