A free hotline has been launched for workers to dob in colleagues who steal from their employer.
The hotline, with the number 0800 RIPOFF, has been set up by Thompson and Toreson Investigations.
The company says phone calls are not recorded and the caller will not have to appear in court.
Typical calls include theft, fraud, time theft, drug use or dealing drugs at work.
Managing director Danny Toreson told TV ONE's Breakfast the programme is not open to abuse by employees with a vendetta against another colleague.
"We analyse it internally with our business - we've been dealing with informants for over 20 years," he said.
"You may well have an axe to grind - but good information, if it's true, then it's true. It doesn't matter whether you've got an axe to grind or not, whether the information is true, whether the allegation is true, that's a different story."
He said an objective investigation is necessary to uncover the truth.
"We're not going to know if it's spurious or truthful until it's been investigated."
If the allegation is true, Thompson and Toreson negotiates a payment with the informant.
"They're given a unique number, and we use that number to negotiate a payment in due course after the event," Toreson told Breakfast.
He said the company deals with anything from small crimes like "stealing money from a dairy" to big thefts and collusion.
Dan Thompson, who founded the company in 1980 when he left the New Zealand Police, said that stealing hurts jobs and profits, both of which are "at a premium" in the business climate.
"If someone can help save business money, it's good for the employees, shareholders, and executives alike," he said Thompson in a statement.
"Don't we want the people who work with us to be honest? Most cases of ethical abuses are uncovered through tips from honest people who are not sure of their facts," he said.
The hotline, which takes calls 24/7, is manned by certified fraud examiners and ex-police officers.