Police are appealing for public assistance to help locate missing man Frank.
The 70-year-old was last seen leaving a home in Woking Street, Craigieburn on Saturday 18 December about 1.30pm.
Frank, who is known to walk around Craigieburn regularly, was headed out for a walk without his wallet or phone.
Police are concerned for Frank's welfare due to his age and as he has a number of health issues.
An image of Frank has been released in the hope someone recognises him and provides information on his current whereabouts.
Frank is described as about 170cm tall with a slim build, short grey hair and has no facial hair.
Anyone who sites Frank is urged to call Triple Zero (000) or with information about his whereabouts is urged to call Craigieburn Police Station on 9303 4433.