The caller claims that there is a problem with the “customers” computer and suggests remedying it over the phone.

The so-called “help” in fact involves the installation of spyware onto the computer, giving the fraudsters access to their victims’ bank accounts and credit card details.

This enables the fraudsters to plunder their victims' bank accounts.

This form of fraud is not new.

There have already been cases of it reported in the UK and France.

The Federal Police says that banks never ask for this kind of sensitive information and certainly not over the phone.