At 10.30am, the 85-year-old woman lost her wallet near the front door of the Mountain Creek Woolworths grocery store on Karawatha Drive.
Around 12.30pm, she received a phone call from a man claiming to be from her bank. When requested she provided the Personal Identification Number (PIN) of a bank card that was contained in the lost wallet.
The woman later discovered that cash had been stolen from her bank account.
Anyone with information which could assist police with their investigations should contact Crime Stoppers anonymously via 1800 333 000 or crimestoppers.com.au 24hrs a day.
Crime Stoppers is a charitable community volunteer organisation working in partnership with the Queensland Police Service.