Businesses in north Norfolk are arming themselves with counterfeit money detectors after a number of fake £20 notes were found in tills across the area.
Police believe the forgeries found at a chemist in North Walsham, a newsagents on East Runton, a pub in Mattishall and a tea room in Fakenham may be linked.
And officers are urging the public to remain vigilant and report any suspicious activity.
What should I do if I get a counterfeit banknote?
1. Retain the suspect note without putting staff at risk.
2. Give the customer a receipt, explaining that the note will be handed to the police. Explain that suspect notes subsequently discovered to be genuine will be returned.
3. Call the police on 101 and hand them the counterfeit note; or take it to a police station later if requested by them. They will send the suspect note to the National Crime Agency (NCA). Counterfeit notes are subsequently sent to the Bank of England for analysis.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here