The man calling to houses in the midlands is travelling in a white Hyundai Tucson.
People in the midlands are being advised to be wary of a suspicious caller.
Gardaí in Laois and Offaly are warning residents to be on the lookout for a person reportedly using a white Hyundai Tucson, offering to help save money on energy bills in exchange for payments.
Sums requested are reported to be significantly high in some cases.
Homeowners are being asked to report any suspicious incidents to your local Garda station, always check for identification, never leave strangers unattended at your door and do not engage or provide any form of payment.