It happened last weekend in Rancho Cucamonga. Two girl scouts went inside the store where they were selling cookies outside to get change for a $50 dollar bill. The cashier discovered the money was fake.
That same day, Girl Scouts at another cookie booth also took two phony $50s.
"Even though we had the pen, the counterfeit pen, the pen did not work. It showed that it was a good bill," said Girl Scout troop leader Cheryl Williams.
When you look at the bills closely, you can tell the shapes of the faces in the bills are completely different.
The San Bernardino County Sheriff's Department came out to show the local Girl Scout troops how to spot fake money. No one has been arrested in this crime.
