Gardaí in Waterford are warning retailers and consumers that counterfeit €50 notes are in circulation around the city.
The warning comes as gardaí investigate a number of robberies over the past 48 hours.
The incidents included a break-in at Low Cost Tyres on the Park Road, Waterford City in which 100 tyres were taken.
There were also thefts from the Halal Food Market also on the Park Road; a break-in at St Catherine's Hall on Catherine Street and a burglary at a house in Airfield Point, Dunmore East.
Gardaí have arrested a man in his 20s after a robbery at a house at Darby Grove, Earlscourt.
In the last couple of days officers have received reports of counterfeit €50 notes in circulation.
They are urging all shop owners and shop assistants to be cautious.