Conservative Party former board member John Stringer was trespassed from the party's AGM on Saturday.

Police have been called to the Conservative Party AGM after former board member John Stringer showed up despite warnings to stay away.

The annual general meeting kicked off shortly before 9am on Saturday at the Holiday Inn hotel on Ascot Rd in Mangere in south Auckland.

Police Northern Communications shift commander Inspector Kerry Watson said police were called to the meeting shortly after 9am.

PHIL WALTER/GETTY Former leader of the Conservative Party Colin Craig said he decided not to attend the AGM to avoid causing a distraction from business at hand.

The party asked police for advice on serving Stringer with a trespass notice for the remainder of the meeting, he said.

Four police officers were called to the scene and were talking to Stringer.

The incident comes amid an ongoing legal battle between Craig and Stringer.

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Stringer said he had been advised by the party he was not entitled to attend the AGM but told them he would attend anyway.

The former board member flew with his wife, who is also a member, from Christchurch to Auckland on Saturday morning to attend the meeting.

He was served with a trespass notice upon arrival but said he refused to leave as he was not told the reason for being banned.

Stringer said he never planned to disrupt the meeting but was forced to leave after the police threatened to arrest him and his wife if they stayed.

Stringer also claimed his wife was shoved by a Craig supporter.

Craig supporters who organised the meeting, which had already been postponed twice, refused to start the official party business until Stringer and his wife left.

Craig said he decided not to attend Saturday morning's meeting, however his wife was there.

"I deliberately chose not to go because I didn't want to get the meeting sidetracked."

Craig said the incident was "unfortunate".

"It needed to be the chance for people to make good, level-headed decisions with members in attendance.

"It didn't need a sideshow."