Prop cash,which is used in movies, is being circulated in Cork.
Gardaí say the notes were spent in Mitchelstown yesterday.
The notes are in varying denominations, including €10 and €20.
However, there is a mark at the side of the note which says "This is not legal. It is to be used for motion props".
Here's what they look like:
Gardai in the county are warning businesses to be on alert for the fake bank notes.
They are being advised to check the notes, especially ahead of the bank holiday weekend.
