Gibson, Dunn & Crutcher denied allegations it helped draft new mass arbitration rules for an arbitration venue related to thousands of DoorDash couriers, and accused opposing counsel of failing to properly vet plaintiffs in a filing Thursday.

Chicago plaintiffs firm Keller Lenkner is seeking to compel individual arbitration for more than 6,000 DoorDash contractors in the U.S. District Court for the Northern District of California.