Police are warning businesses in Gedling borough to be on the alert after reports of a man visiting shops in the nearby area and handing over fake Irish twenty pound notes.
The man has so far visited shops in Lowdham, McColls in Southwell and has also reportedly been seen in petrol stations around the Sherwood area.
The vehicle he is using is a green Series 1 BMW reg W688RLA.
Although not classed as legal tender, businesses are still allowed to accept both Irish and Scottish bank notes.
A spokesman for Nottinghamshire Police said: ” We have no description of the male as yet, but please make local businesses aware when visiting.”
Anyone with information should contact 101, or ring Crimestoppers on 0800 555111.