A group of fraudsters dressed as monks have re-emerged on the streets of Sydney in a campaign thought to be timed to cash in on an influx of visitors to Sydney for the Vivid festival.

NSW Fair Trading Commissioner Rod Stowe has issued a renewed warning to people not to give money to the robed men and women, who are dressed as Buddhist monks and approach people for money on the street, but who really have no affiliation with the religion.

A man claiming to be a monk in Sydney's CBD. Credit:Megan Levy

Fairfax Media witnessed two men handing over cash to a "monk" dressed in orange robes in Darling Harbour this week.

When approached and asked to identify which religion and organisation he was from, the "monk" claimed he was Buddhist and tried to hand over a small medallion.