Family First has been stripped of its charity status.
The Charities Registration Board said in a decision today the reason was "because it does not advance exclusively charitable purposes".
"The board considers that Family First has a purpose to promote its own particular views about marriage and the traditional family that cannot be determined to be for the public benefit in a way previously accepted as charitable," said chairman Roger Holmes Miller.
"Family First has the freedom to continue to communicate its views and influence policy and legislation but the board has found that Family First's pursuit of those activities do not qualify as being for the public benefit in a charitable sense."
In April 2013, the board removed Family First from the Charities Register for the same reason but that decision was appealed in the High Court.