An elderly man was allegedly targeted by a rogue trader in a Lincoln village who claimed he had carried out building work on his home.
The man was approached by the rogue trader who requested money from him at his Cherry Willingham home at around 11am on Tuesday, April 7.
The elderly man refused and closed the door before the suspect left the property and drove off in a white van.
The incident has prompted Lincolnshire Police to remind residents to be extra vigilant.
Inspector Gail Hurley said: “We would like to remind all residents to remain vigilant and for people to look out for their neighbours and those who may be vulnerable.
“We always advise people not to pay cash on your doorstep. The message is: ‘If you are not sure, don’t open the door.”
Police said older and more vulnerable people are more likely to be a target for rogue traders, doorstep criminals and scammers – click here for further advice.
To report a non-urgent crime call 101 or in an emergency dial 999.