a device and a method are provided for checking whether when an object has a sufficiently . the object to be examined extends in an object plane . a force exertion device exerts a force on the held object such that the force includes a force component at right angles to the object plane . a fan generates a flow of a fluid which hits a movement area of the object . a holding device holds the object so that the object is held flat in a holding subsurface of the object plane and is movable in a movement area located outside the holding subsurface at right angles to the object plane . a measuring device tests whether the force produced by the force exertion device causes the movement area of the object to be deflected by a distance at right angles to the object plane which is greater than a predetermined limit .