SAN BERNANDINO, Calif. (KCAL/KCBS) - In California, some girl scouts are learning how to spot fake bills after a pair of crooks paid for their cookies with phony money.
Two teenage girl scouts have been selling cookies together for almost a decade, and this year's money is going toward their gold award projects that will serve the community.
On Saturday, the high school sophomores were fundraising when they took in two of these seemingly legitimate $50 bills at a cookie booth in front of a Stater Brothers in Rancho Cucamonga.
When they tried to break a fifty for smaller bills, a cashier told them the bill was fake.
Troop leader Cheryl Williams was stunned.
"Even though we had the pen -- the counterfeit pen -- the pen did not work," she said. "It showed that it was a good bill."
That same day, another cookie mom at another cookie booth at a Vons in Rancho Cucamonga also took in two phony fifties.
Monday night, a spokesperson with the sheriff's department held a lesson for girl scout troops on how to spot counterfeit cash using one of the bills taken in by the troops.
The fake bill doesn't quite feel like the real one.
Parents were also given this handout.
"The difference is if you look at the faces they're all the same here," Teresa McMahon with the San Bernadino County Sheriff's Department said. "Here you can actually tell by the shapes of their faces that they're completely different."
The Girl Scout friends are chalking up this weekend's event as a life lesson in funny money.
"When you do put yourself out there, you're going to have to, like, double check," Tari said.