The amount of money lost to phone [problem]mers has tripled in a year, prompting a major awareness campaign.
An estimated £23.9m has been tricked out of unsuspecting victims in the last year, up from £7m the previous year, according to Financial Fraud Action.
The main trick involves a con artist deceiving victims into believing they are calling from the police, a bank or a computer company.
They suggest that the individual has been the victim of fraud and ask for personal financial information - such as card details or a Pin code - to access their account.