It was police in Louisville that alerted Lexington Police about the fake money being passed around.
Detective Michael Helsby with the Financial Crime Unit says counterfeit bills are not uncommon here in Lexington.
More than $2,000 worth of this counterfeit cash was created and some of it was spent at local fast food joints. This investigation involved all $100 bills.
Detectives could tell just by looking at most of these bills that they were fake.
"They were using the same serial number for every bill. So, they just scanned it and hit 20 copies and printed out. It wasn't like they were taking a lot of time to manufacturer it. They just probably ran out of paper."
Two men from Owensboro and one from Lexington are now in jail. Detectives want people to know that committing this crime is a felony.
"It's not worth it. The amount of money you would have to make to make it worth while being charged with a felony. It's not worth it. You will get caught. It's really hard to duplicate the currency."
Because the investigation is ongoing, police are not releasing the names of those that produced the counterfeit bills.
Police say some federal agencies may get involved in the investigation.
Lexington Police Detectives are confident that they have recovered all of the the fake money from this case.