The victim, who lives in Alfreton and is in his 80s, was approached by a man with an Irish accent who offered to jet wash and seal his driveway for £600.
A Derbyshire police spokesperson said: “After attempting to complain about the work the victim was told that the company had not completed work in the area on 10 November.
“Officers are appealing for help identifying the man pictured, who was in the area at the time of the incident.”
Anyone with any information is asked to contact Derbyshire police using any of the below methods, including reference 21*660372:
Facebook– send a private message to /DerbyshireConstabulary
Twitter– direct message the contact centre on @DerPolContact
Website– complete the online contact form derbyshire.police.uk/ContactUs
Phone – call Derbyshire police on 101.