Provided is a method for verifying holding members in a heating station equipped with a device for transporting the preforms. The device includes a plurality of movable supports circulating in a closed circuit and members for individually holding the preforms by their neck, where each of the holding members is borne by a movable support. The method includes setting the movable supports in movement to bring them successively into an acquisition zone, acquiring an image of each individual holding member in the acquisition zone, and automatically verifying the presence of a holding member on each of the images taken.