The Serious Fraud Office has closed its investigation into an alleged breach of Telecom's database that allowed a rival to access sensitive customer information, saying it found no evidence of criminal offending.
A marketing company working for Telecom's rival, Slingshot, was earlier this year accused of accessing the telco's Wireline database, which contains personal customer information.
The SFO received a complaint from Telecom in January, but SFO's general manager of fraud and corruption Nick Paterson said investigations by staff found no evidence of criminal offending.
Asked whether this meant there was no breach of Telecom's database, Paterson said the SFO's remit was around criminal offending.
"That's what we are concluding on and we are making no comment on any other sort civil breaches.