Schools, churches, GP surgeries and businesses across the county are being warned to be on their guard against bogus callers posing as road maintenance contractors working for Derbyshire County Council.
The county council has received a number of complaints about men claiming to be from a company employed to repaint road markings.
Various businesses and community venues in Matlock, Alfreton, Duffield, Ripley and Ashbourne have been targeted by rogue traders who ask for money to pay for special paint for road markings outside their property.
The scammers produce a fake letter from the county council which they claim gives them permission to do the work.
Councillor Simon Spencer, Deputy Leader of Derbyshire County Council and Cabinet Member for Highways and Trabsport, said: “We want to warn local people that we would never call door to door asking for money or ask anyone else to do so on our behalf.
“This is not genuine – it is a scam and people should not hand over any money to these conmen.”
Anyone who is approached by these people should call Consumer Direct on 08454 04 05 05. If anyone feels threatened they should call the police.