Over 6,000 taxi drivers and car-hire operators in Australia filed suit against Uber.
Uber is accused of operating in the country illegally and violating regulations.
"Uber sells the idea that it does things differently, but in reality and as we allege, this has meant operating unlawfully, using devious programs like 'Greyball,'" Maurice Blackburn lawyer Elizabeth O'Shea said in a statement, referring to software preventing regulators from monitoring the Uber app.
An Uber official said the company was aware of media reports on the class-action suit but had not yet been served.
"Uber denies this allegation and, if a claim is served making it, the claim will be vigorously defended," a spokesperson said.
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