Corio police are hoping to identify a man after a parcel was stolen from outside a house in Corio on 18 May.
It is believed an unknown man entered the front yard of a property on Bacchus Marsh Road and stole a parcel left on the front doorstep just after 9am.
The thief then left the scene and it is believed he may have been carrying other parcels.
Investigators have released images of a man who they believe can assist with their enquiries.
The man is perceived to be Caucasian in appearance, aged in his late teens to early 20s with short brown hair and a medium build.
He was wearing a white baseball cap, black puffer jacket, red shorts and black runners.
Anyone who recognises the man or has any information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppervic.com.au.