Cambridgeshire Police have released an image of a man they want to speak to in connection with theft and rogue trading offences.
An elderly and vulnerable woman was targeted on February 9 when a man told her she owed him £1,200 for work he had not carried out.
The victim allowed the man into her home while collecting the money and her purse was taken from a cabinet.
Several days later he returned and took £1,500, again for work he had not done.
Anyone who recognises the man in the image, taken at the Duxford property, or has any information should contact DC Alice Draper on 101 or Crimestoppers, anonymously, on 0800 555111.