However, Rotorua defence lawyer Aroha Cooper said a number of repeat offenders already attracted media attention and she did not think there was a need for them to be singled out in a public list.
New Zealand's worst repeat criminal has more than 1100 convictions, documents reveal.
Convictions, grouped by offence type and court cluster, were handed down between July 1980 and June 2012.
Rotorua's top 10 criminal list shows five individuals have more than 250 convictions each. Fraud and deception offences were most common, then theft.
The fifth-worst, with 255 convictions, has been convicted of a homicide-related offence.
Howard League for Penal Reform chief executive Mike Williams said hardcore conmen were the hardest to rehabilitate and naming them would benefit the public.
"These are not victimless crimes. If you know these people are conmen, you can at least avoid them."
Te Akau Waaka of the Prisoners Aid Society Rotorua helps find them accommodation and employment.
Special agencies also worked with prisoners and their families before inmates were released, she said.
"Most of our work is connecting up [prisoners] and referrals to agencies" which provided support for specialist problems like drug and alcohol addiction or violence programmes "for men that keep battering their women".
Worst 3 recidivists
No1 - 330 convictions: 262 for fraud/deception. Others include violence and theft, traffic offences, abduction, harassment, drugs, weapons and explosives offences.
No2 - 275 convictions: 208 for fraud/deception. Others include violence, theft, burglary, drugs, weapons and traffic and vehicle offences.
No3 - 265 convictions: 245 for fraud/deception. Others are violence, damage and traffic offences.
Source: Ministry of Justice