The police are warning the public remain vigilant after it emerged that fake £20 notes in Northern Ireland are in operation.
Sharing pictures on social media of the back and front of the note, the PSNI said fake money had been already been used in one local business in Derry city centre.
According to the police, the counterfeit used had the '"same serial number" and the public is being asked to look out for notes that "are thicker and heavier than normal".
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Police officers are warning the public and retail workers to be extra careful when handling cash.
They are asking people to thoroughly check all bank notes, be vigilant if anyone uses a high-value note for a low-cost item and to use UV light or a note detector pen if working on a till.
PSNI Chief Inspector Calderwood told Belfast Live that if anyone came across the notes, they should report it to the PSNI straight away.
She said: “Counterfeit notes are damaging for local businesses and we would urge anyone affected to continue to report any incidents to us immediately by calling 101."
Meanwhile, a PSNI spokesperson added: "Please take care whilst handling cash. They had the same serial number, are thicker/heavier than normal and do not have a reflective foil.
"Please let friends and family know."
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