Originally Posted by ericdabbs

You don't need to hit the soft cancel or change payment buttons on the screen. The hard buttons (red Cancel or yellow Change Payment) on the card reader should work as well.

Also I brain farted this morning when loading my Serve card when I didn't realize that the card reader was the color screen version instead of the black and green screen version since most of the WMs around me use the black and green screen so I was used to hitting Cancel. So when I swiped my OV and tried to hit Cancel it went to signature and the cashier told me it got denied. I told her that I hit the wrong button and I was able to swipe again and made sure to hit Change Payment this time. Didn't need to wait for a manager to do a system override to allow me to reslide my OV. Maybe the cashier you had was not trained to do that.