TOOWOOMBA police are investigating a series of unauthorised PayWave transactions at Grand Central in February.
Police believe a man and a woman may be able to assist with their inquiries.
The transactions occurred on Tuesday, February 3.
- Police issue PayWave and Paypass security warning
- Police warn of PayWave fraud as thieves target cards
The man has a large tattoo on his inner right forearm. The woman was pushing a pram.
It is believed the card used for the transactions was picked up outside the shopping centre.
Anyone with information that could assist can call Policelink on 131 444 or anonymously on Crime Stoppers on 1800 333 000.