[spdbrake]

Yes if yours has the axle nut, the nut top is pinching into a depression on the axle. (hammered in with a punch after torquing) You should able to see it.

If yours has the bolt attaching to axle, hopefully the installer applied a slippage mark to the edge so you can see if it rotated. Does your car have an integral hub / pin drive assembly? If yes it has the bolt type axle attachment.