Police are appealing for residents to contact them if they have been approached by a man asking for money.
Several incidents of an Asian man calling at homes in the Biscot and surrounding areas of Luton have recently been reported.
The man tells residents he has just moved in close by and needs a lift or money.
He appears to target elderly residents and so far it is believed seven people have given him cash.
A man has been arrested and bailed on the offences but police want to hear from anyone else affected. Contact Beds Police on 101.
Alternatively you can contact the independent charity Crimestoppers, anonymously, on 0800 555 111.