The classic “change raising” scam works differently than “short changing,” but the net effect is the same.
The grifter approaches a sucker (an overworked, busy, distracted and disinterested cashier is ideal). He asks, “Can you give me a ten for ten singles?” Sounds fair. The cashier always needs singles, so she agrees. She hands him a TEN, he accidently hands her NINE singles and a TEN. “Count it, please,” the grifter pleads.
When she counts, she discovers NINETEEN dollars. The grifter says, “Here, if I give you another single, that will make 20.”
And she hands him a crisp TWENTY.
And loses TEN bucks. How?
Cashier receives, $19. ………. +19
Cashier gives $10 ………….. +9
Cashier receives $1 …….. +10
Cashier gives $20 ……… -10
Or the other way around …
Grifter gives $19 ……. -19
Grifter gets $10 …….. -9
Grifter gives $1 ……. -10
Grifter gets $20 ….. + $20