Jewellery and ornaments are reported to have been stolen from a property in Seamark Close, Monkton, between midday and 6pm on Tuesday 13 October 2020.
The items were stolen after a woman attended the address and posed as a carer to gain entry.
Officers have reviewed CCTV and checked for forensic evidence. They have also worked with the victim, who has helped create the image.
The suspect is described as being a woman who is around five feet six inches tall and in her late 30s.
She spoke with an English accent and was wearing glasses and a beige cardigan with a blue tabard underneath. She was also wearing blue shoes.