Footprints are being posted through letterboxes in Derbyshire at properties where police officers have found windows left open.
The idea is to show residents how easy it would have been for a burglar to have sneaked into their home.
The footprint flyer bears the message ‘You have left your home insecure’. Detective Chief Inspector Malcolm Bibbings said: “I hope these flyers will help raise awareness and make people realise they have left themselves and their property vulnerable to burglars.
“We want to encourage people to think about home security and take simple steps to prevent yourself falling victim to this type of crime - such a locking doors and windows of homes, sheds and garages, and not leaving items on show.
“Being a victim of a burglary can be a traumatic experience. It is an attack on your personal and private space.”