Duncan O'Coinga

 (born circa 1968-69) is an Australian VidSpacer/YouTuber focused on scambaiting under his channel ScamWatch.

Biography
Duncan was born in, the son of Korean War defector Alexander O'Coinga II (1930-2002). Duncan originally started out as a delivery boy for Jinan Gold, his father's Chinese restaurant business in. While not scambaiting, Duncan works behind the counter at Jinan Gold.

Scam baiting
Duncan carries out investigative scam baits in which he infiltrates computer networks run by technical support scammers and various types of fraudsters through the use of remote access software and social engineering.

In 2018, investigative work by Duncan led to the arrest of Filipino-born scamming mogul Rodrigo John Capundan Jr. as well as a Canadian man who had hacked several Ring and Nest cameras, and in 2019 O'Coinga contributed to a crackdown on bitcoin sextortion e-mail rings in Engotu.