Police say they spotted the 31-year-old Forney making an illegal left turn in Melville on Thursday and discovered his license had been suspended.
Forney was arrested on a misdemeanor suspended license charge - until officers said he proffered the counterfeit currency as bail money. He was being held early Friday on a felony charge of possessing a forged instrument.
No telephone number could be found for Forney at the address police had for him, and they didn't know whether he had a lawyer.