Police Scotland are reminding the public, particularly those who are employed in shops or who regularly handle cash, to be aware of counterfeit banknotes.
Two further cases have been reported in the Highlands this week in the Inverness city area.
Detective Constable Gregg MacDonald advises: "Recently Police have received a number of reports of counterfeit banknotes being used in the Inverness and Nairn areas in recent weeks. These include First Trust Bank £50 notes which bear the serial number AA294395. These are being tendered for low cost items in shops in the Highlands and later being found to be counterfeit currency."
"Police are advising those members of the public who are dealing with cash sales to bear this in mind and check high value banknotes before giving change. Anyone who deliberately uses counterfeit currency is committing crime and we will investigate all instances reported to us".
"We are keen to identify and speak with a male described as being white, 25-30 years old, about 5’ 10” tall, medium build, short brown hair, thick Irish accent with distinctive tattoos on his arms and neck."
Anyone who has any information about those using the counterfeit banknotes or wishes to report having received one should contact Police Scotland on 101 or Crimestoppers on 0800 555 111.