The Federal Trade Commission has sued Uber over its Uber One subscription program, alleging the company enrolled consumers without valid consent, failed to deliver promised savings, and made cancellation more difficult than advertised. The case, now pending in the Northern District of California, puts one of the country’s most visible subscription products at the center of the FTC’s ongoing campaign against so-called “dark patterns” in online commerce.

According to the agency, Uber used deceptive interfaces and billing practices to sign users up for Uber One and then created unnecessary friction when they tried to cancel.