The 82-year-old answered her front door to a man claiming she owed him £200 for decorating work.
The victim paid him but no work had been carried out.
It is believed the man first knocked on the door of her home, in Foxlands Road, on either the 11th of 12th of December 2018.
He then returned on a second occasion and was caught on CCTV that had installed after the first offence.
Investigators have released this image in the hope that someone will recognise the man and contact police.
They would also like to hear from anyone who may have been approached by this man, or who was in the area and saw a man acting suspiciously.
Anyone with information is asked to contact PC Schlosz at the East Area Command Unit via 101.Tags: Dagenham
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