Tayside Police is asking householders to be on their guard against bogus callers and rogue traders who may be operating in their area.
Residents are asked to be suspicious of anyone arriving unannounced at their door.
People should ensure doors are secure, even when at home, and use a door chain.
They should not let anyone in until they are certain of who they are, or who they claim to represent.
With regard to anyone claiming to represent a business, authority or agency, householders should demand to see their identification.
Bona fide tradespeople, or company representatives will not be offended and will be happy to provide genuine identification.