The politician, who resigned from Parliament today, was an ambassador for the White Ribbon Trust.
But the embattled South Island MP, who is embroiled in a sexting scandal involving young women, was removed from the role last night.
In a short statement the trust said a decision was made to remove him from the trust last night.
He was sent a letter this morning advising him of the decision.
White Ribbon aims to eliminate violence against women. Supporters wear a white ribbon to show that they do not condone this type of behaviour.
According to its website the annual White Ribbon Day celebrates men willing to show leadership and commitment to promoting safe, healthy relationships within families and encourages men to challenge each other on attitudes and behaviour that are abusive.
