Police are trying to find two men who are allegedly pressuring people to pay for cleaning and repair services, then taking the money and fleeing without finishing the job.
Warrants to arrest have been issued for Tommy Ward and William Donohue in relation to a series of incidents.
Police say the pair, who have "strong Irish accents", are part of a group going door to door offering to clean or repair roofs. They allegedly ask for the money up front but leave without completing the job.
They are believed to be travelling in a silver Volvo SUV and have recently been seen in the Whanganui area.
Numerous people have contacted the Weekend Herald in recent weeks claiming they have been victims of roofing scams.