Residents are being urged by trading standards officers to be on their guard against rogue traders in the run-up to the digital television switchover.
The switchover takes place in August and September and there are fears unscrupulous tricksters could try to take advantage of vulnerable residents.
Derbyshire County Council’s trading standards department is warning customers only to buy goods and services from reputable retailers and traders carrying the ‘digital tick’ logo.
They are also being warned not to buy equipment from uninvited callers and not to agree to work on the spot.
The council also said staff from Digital UK, which is running the switchover, would not call without an appointment.
Residents are advised that if an offer seems too good to be true, it probably is.
Derbyshire County Council’s cabinet member for recycling and technology, Coun John Allsop said: “Most people shouldn’t need any work doing to their aerial in order to receive the new digital television signal.
“But if it is, our Trusted Trader directory is a great place to start.
“It’s also a good idea to make sure you know the facts about the switchover - you’ll be far less likely to fall victim to scams and rogue traders.
“The information residents should already have received from Digital UK will tell you everything you need to know.”
Householders wanting to find out more about switching to digital television, log on to www.digitaluk.co.uk or call 08456 50 50 50.