A purse containing £140 was stolen from an 87-year-old woman.
The purse was taken on Thursday, November 22, when the woman was shopping at WH Smith in Worcester Park.
The victim said she may have been followed into WH Smith from the Post Office where she had withdrawn money.
Police want to speak to the man and woman in these CCTV images in connection with the theft.
The people may have been accompanied by two boys aged between 8-11 years and may not be connected with the offence.
If you have any information call Detective Constable Jackie Craig at Sutton CID on 020 8649 0747 or call Crimestoppers anonymously on 0800 555 111.