Moorabbin Crime Investigation Unit detectives are investigating following the theft from a car and subsequent deceptions last month.
Investigators have been told a car was broken into and a wallet stolen in the Parkdale area on 28 August.
A bank card from the theft was used at various convenience stores in Mentone, Black Rock and Beaumaris the following day.
Police have released images of a man they believe can assist with their investigation.
The man is perceived be Caucasian in appearance, aged in his 40s, and is of average height and build.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppervic.com.au.