I have had what call pocketing, the practice of getting the correct change out of the till then palming some of the change. giving the incorrect change then doing something to get their hand into there pocket like getting a tissue to wipe their nose. dropping the change into their pocket.
I stood my ground and refused to move from the till until i had the correct change, i was threaten with the police if i did not move . I told them to go ahead as i would like to get them to sort the short change out. the till operator did not want the fuss of the police.
The manager was checking the CCTV for the till i was served at, and is i kept my hands over the bagging area, and left my change is full view and the till draw he could see a change in the coinage between the till and my hand.
The police where call but not to move me on.they where there to arrest the till operator.