Te Runanga o Ngati Porou has signed with Maori database administrator Tuhono to help manage its beneficiary roll.
The East Coast iwi has 28,000 registered members, but any mail-out will get as many as 10% of returns to sender.
Waatea News reports Tuhono works with the Electoral Enrolment Centre to collect the tribal affiliations of Maori voters and make that available to mandated iwi organisations.
Chief executive Dan Te Kanawa says Tuhono's technology will allow Ngati Porou to draw on NZ Post data to keep its roll up to date.
He expects other iwi to follow Ngati Porou's lead once they see the benefits of aligning with Tuhono.