There is confusion over a decision to close an investigation into private investigators, Thompson & Clark.
The Serious Fraud Office is not pressing charges, saying the "high evidential standard" for laying charges had not been met.
Greenpeace executive director Russel Norman says Thompson & Clark was spying on activists for the Ministry of Business, Innovation and Employment.
"It's very worrying when a firm like Thompson and Clark gets away with it, in this case when they were found to be doing a whole bunch of - in my opinion - unlawful things."
- Thompson and Clark didn't break law recording Southern Response claimants' meetings - police
- $180k of taxpayer money used to spy on Kiwis after Christchurch earthquakes
- Inquiry finds Thompson and Clark spies snooped on earthquake victims
- Southern Response chair resigns following Govt spying fiasco
Thompson & Clark was also accused of spying on Canterbury earthquake claimants.
Dr Norman says MBIE has promised it will no longer work with Thompson & Clark. The Prime Minister in March last year ordered Government departments not to use the firm.
"It will be interesting to see if Government officials have learned their lesson from their decade of working together with these private investigators to target climate activists," said Dr Norman.
But he's disappointed no one will be held accountable.
"They were certainly unlawfully using the NZTA database, and they were acting for oil companies and working with MBIE."