Police are warning residents and retailers to be extra vigilant after reports of fake £20 notes being exchanged in North Norfolk and Broadland.
Five incidents of fake notes being used in shops, particularly in Cromer, Wells and the Aylsham area, have been reported to police over the last 24 hours.
Retailers are being urged to be vigilant and to take crime prevention measures, such as using a UV lamp or a testing pen which will indicate whether a note is genuine.
PC Andy Mason, Broadland engagement officer, said: 'It's concerning to hear of these fake notes being circulated and I would ask people to examine cash carefully.
'If someone tries to offer you any fake notes, or you know any information about those involved in the circulation of counterfeit money, please contact Norfolk police on 101 or you can contact CrimeStoppers anonymously on 0800 555111.'
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