Two con artists approached a man on a northern-suburbs street and used a fake lotto ticket to scam him out more than $10,000, police believe.

Police say the two men approached the victim on Pascoe Vale Road, Glenroy, about 2.30pm on July 22.

One of the men police would like to speak to.

One of the men told the victim he had a winning lotto ticket which he could not cash because he was an illegal immigrant.

Senior constable Melissa Seach said the other offender offered to buy a share of the ticket and left briefly, returning with a wad of cash believed to be $40,000.