"Consumers were led to believe by this conduct that when using these e-cigarette products, they would not be exposed to the harmful chemicals found in ordinary cigarettes," ACCC acting chair Delia Rickard said. "In fact, they were exposed to the same chemicals, including a known carcinogen that has no safe level of exposure.
"Businesses must ensure that they provide accurate information to customers, and have a reasonable basis for making any representations. This is particularly important for products that may cause harm to the health of consumers."
The watchdog said it had written to more than 30 Australian e-cigarette suppliers reminding of their obligations under the law, in particular to ensure information provided to consumers is accurate.
The court action against Elusion and Social-Lites was launched in June last year, while the action against Joystick and its director came after the company failed to pay infringement notices issued by the ACCC.
The ACCC's case was based on independent testing which identified the presence of carcinogens and toxic chemicals, such as formaldehyde, acetaldehyde and acrolein in the products of Joystick, Social-Lites and Elusion, as well as acetone in Social-Lites' products.