your slips when you sign them at the shops after you have swiped your card?
I do loads of card transactions every day and recently made a mistake by undercharging a gent by R300+ (instead of charging 900 odd, I pushed the 6 on the pad) Anyhow, we are a distributor so it was easy to find the gent however, he has basically said his gain and my loss. I have to pay this shortfall now but I cant help think he must have known I made the mistake when he signed his slip and just kept quiet. Im so pee'ed off with myself although its the first time Ive ever made a mistake like this but am seething that this oke is being such a douche about it.
Sadly for him, next time he wants something from us, the sales team will be inflating his cost to recoup my loss so he has essentially just shot himself in the foot. Just because he wont play nice.