Detectives in Enfield have released CCTV images of a man they would like to speak to in connection with a series of frauds against a pensioner.
The victim, a 72-year-old man, was defrauded out of £100,000. The man - from Enfield - is believed to have been targeted initially in 2014.
The offences have been committed at banks, mostly across north London, but offences have also been committed in Bradford.
The suspect is described as black, medium to large build, aged in his 50s to early 60s, with thinning black hair and wearing glasses.
He is believed to have misled financial organisations by posing as the victim after fraudulently obtaining his details.
The officer in the case, DC Laura Penny of Enfield CID said: "We are keen to trace the man in the footage. As you can imagine these offences have caused a great deal of distress to an elderly, vulnerable man.
"The offences have taken place over a two year period and we are determined to bring it to an end. I would urge anyone who knows who this man is to come forward."
Anyone who recognises the man or has any information should contact detectives in Enfield borough on 101 or via Twitter @MetCC.
You can also give information anonymously via Crimestoppers on 0800 555 111.