Moreland Crime investigation Unit are investigating following a theft and subsequent deceptions in Brunswick in January.
Investigators have been told an unknown woman gained entry to a change room at a Weston Street business just before 6pm on Friday 24 January.
The woman stole a bag from the change room which contained two mobile phones, headphones, and a wallet.
Bank cards contained in the wallet were later used at three business on Sydney Road, Brunswick.
Police have released CCTV of a woman who they believe can assist with their investigation.
Anyone who recognises the man or has information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppervic.com.au