Police are warning people not to speak to two people who are stopping people in Harborough town centre, claiming to be carrying out a survey for charity.
Officers said that the women are bogus and are using it as a distraction method while they steal your wallet or purse.
The con artists are described as of Mediterranean appearance and carrying a clipboard.
They are typically in the town centre around 12-2pm.
Police said that official charity collectors are always happy to provide the correct identification if asked.