Have you seen 47-year-old Ian Clipson in the Lincoln area?
The distinctive family man, who has links to the city, has been missing from home for four days.
Humberside Police are appealing for sightings of Mr Clipson or his car.
He was last seen at his home in Barton-upon-Humber, near the Humber Bridge in North Lincolnshire, last Saturday, December 7.
Mr Clipson has not made contact with friends or family since he left Far Ings Road in Barton at 9am that morning.
Described as a white male, 5ft 9ins tall and with long shoulder-length hair, he is of a stocky build and has stubble.
And he was last seen to be wearing a light brown coloured KAPPA jacket, a plum coloured T-shirt, khaki trousers and brown shoes.
"It is believed Mr CLIPSON left his home address in a silver-green coloured Ford Fiesta VRM Y141 UGG and police would ask anyone who may see this vehicle to please get in touch," a Humberside Police spokesman said.
"Officers are concerned for the welfare of Mr Clipson because his disappearance is out of character for him.
"And it is not like him to not make contact with friends or family.
"He has connections to North and North East Lincolnshire, along with the Lincoln and North Yorkshire areas."
Anyone with information can call Humberside Police on 101, quoting incident log number 314 of December 9.