The investigation began when police were called to Sussex Street in Cabramatta to reports of an assault just after 5pm on Monday, September 29.
Police were told a group of people had gathered at the location to try to get a refund after a number of fake tickets to a music festival were allegedly sold on social media.
A short time later, the crowd was dispersed, and police arrested a 20-year-old man at a Sussex Street home.
He was charged with dealing with the proceeds of crime less than or equal to $5000.
He was bailed to attend court on October 8.
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