The businessman alleges that when he bought the database, IMG assured him it complied with the necessary legislation and the email holders had given their permission to be contacted, said senior investigator Toni Demetriou.
The first two set of charges were laid with the court in February. The Department applied for an injunction to stop Mr Battles from sending commercial electronic messages ending with .nz without getting consent, and from selling unconsented email databases in New Zealand.
The sale of databases in New Zealand by IMG continues to cause problems for people who purchase them, he said.
Internal Affairs was continuing to investigate businesses that have bought the database, and some had been fined for breaching the act.
"There is a misconception and a misrepresentation made that, under the Unsolicited Electronic Messages Act, an individual or organisation can send business-to-business commercial electronic messages. This is not so," he said.
"You need to have appropriate consent before sending any commercial electronic messages, and, if deemed consent is being relied upon, then the messages that are sent must be relevant to the business, role, functions or duties of the recipient in a business or official capacity."
Internal Affairs previously prosecuted three New Zealanders involved in a major international spam network in 2008.
The network marketed 'pharmaceutical products' such as male-enhancement pills, prescription drugs and weight-loss pills.
Brothers Lance and Shane Atkinson were ordered to pay $100,000 each and Roland Smits $50,000 by the Christchurch High Court.
Lance Atkinson was ordered to pay $18.4m by a US Federal Judge following separate action by the Federal Trade Commission.