Bogus callers pretending to be from St Leger Homes are preying on elderly people in and around Doncaster.
Tenants are warned to beware of anyone claiming they have been sent to service gas appliances.
A spate of similar incidents has taken place in Barnsley, when again, older people were targeted.
St. Leger Homes reminds its tenants to always check for identification, and if in doubt to ring the company on 01302 735191 to check if a tradesperson has been sent to their home.
If their home is due to be checked by a gas engineer they will have received a letter in advance from the company.
Gas engineers sent by St. Leger Homes will always wear a St. Leger Homes uniform and will arrive in a St. Leger Homes marked van.