Coca-Cola South Pacific has received a formal warning in Australia over an SMS marketing campaign that breached the country's Spam Act.

Last month, 100,000 Coca Cola Co promotional SMS messages were sent out over two days.

The Australian Communications and Media Authority (ACMA) said today (10 November) that the messages did not contain information about how a recipient could ensure they did not receive further messages, or contain information about how to contact Coca Cola South Pacific, the authorising organisation.

It ruled that the campaigns breached the Spam Act 2003. It issued a formal warning to Coca-Cola South Pacific Pty Ltd, but did not fine the soft drinks company.

The ACMA accepted enforceable undertakings from three further companies - Vodafone, New Diaolgue and Big Mobile. These companies are to be fined for breaching the Spam Act.

"The ACMA considers that well-resourced companies should be compliance leaders," said Chris Chapman, chairman of the ACMA.

"There is no excuse for them to fall short in their obligations under the Spam Act for SMS marketing campaigns."