CCTV cameras have caught the moment that a person used a little work to carry a complex screw with chemist Adelaide.
With a film, given to Nine News, a man can be seen walking up to the money at Wayville's store by a bottle of three dollars of hand soap.
They'll give you a note of $ 100 and get $ 97 changed.
This is where the scam starts.
The buyer then pulls a handful of notes and coins and wants the money to swap, news.com.au.
Since the young currency calculates the money, the individual is passing them by pulling bills slowly into his purse and taking over the counting process, and his budget t 'pushing more coins over the barrel.'
The total exchange took only a few minutes but, by the end of the period, the total customer walked up with an additional $ 50, with the cashier more expensive.
Ashleigh Scott, one of the workers, told the man's Nine News "was he designed out".
"He knew exactly what he was doing. Buy something cheap, give a large note, and take out a pocket full of coins when he could pay that," she said.
Vu Vo, the manager, said the scam was so fast that it looked like a "magic wizard".
Mr Vo feels that the scammer aimed to aim for a young member of staff for a cause because they are more easily considered to be upset.
“Coming out to the staff and getting things out like this makes them feel more resilient and less trusting in others,” he said.
HOW TO GET THE SCAM
• The customer is giving a note of $ 100 and donating it with his $ 97 change.
• Then he pulls out a handful of notes and coins and applies it to the surface, asking the treasurer to give him the money.
• The person changes and after having exchanges with the cashier he will get the money and count them.
• As it counts it takes in some notes into a poem in his hand.
• Then he tells the cashier that she didn't give him enough money and spent her hand more.
• It leaves an additional $ 50