Melbourne police are warning people about a scam in which fraudsters pose as bankers and ask for money.
They say they cold call customers and tell them they have been overcharged in fees and will be reimbursed a large amount of money.
The scammers give people a pin number and ask them to send a money order to India to cover GST.
Police say they know the account details, date of birth and address of the people they are targeting.
At least five people have reported the calls, but police do not think any of them paid up.