Group buying site, Groupon, has come under fire by the Australian Communications and Media Authority (ACMA) for sending multiple email newsletters to people without their consent.

The ACMA issued a formal warning to Groupon Australia after receiving complaints from consumers who continued to receive both daily and weekly Groupon newsletters after they believed they had unsubscribed from its mailing database.

“The ACMA considered information provided by Groupon left it unclear what individuals were unsubscribing from. In the ACMA’s view, it was reasonable for individuals to expect they would be unsubscribed from all newsletters unless they were advised otherwise,” the ACMA said in a statement.

According to the ACMA, the company also failed to action requests to unsubscribe by customers within five business days, violating the Spam Act.

Groupon has now reworded its newsletters and website to make it easier for users to unsubscribe.