Police have issued about 19,000 warnings for low-level crimes in the past 15 months, which has led to thousands of arrested people side-stepping a prosecution and being spared a day in court.
Police Commissioner Peter Marshall says the approach doesn't mean the force is being soft on crime. It has been a resounding success, reducing the number of charges in district courts by 9 per cent and freeing up officers for more active policing.
Pre-charge warnings were first trialled in Greater Auckland as a way of dealing with minor offences without clogging up the court system.
Half of the 19,000 pre-charge warnings issued between September 2010 and last November were for breaches of liquor bans and general disorder. Other common offences included fighting in a public place or shoplifting an item worth less than $500.
"These are 19,000 people who would otherwise go to court, who would clutter up the system in terms of court time, let alone police officers preparing prosecution files and spending time in court. So it frees up the system," Mr Marshall said.