National's Hutt South MP Chris Bishop says he changed his policy around using social media app Snapchat to message young people after learning that parents were "unsure" about it.
Fairfax reported this morning that Bishop, who is National's spokesman for police and youth, was confronted before last year's election by a mother upset at him for messaging her daughter and other minors.
Witnesses reportedly said Bishop was taken aside and asked to stop what he was doing.
"I wanted to confront him as many parents felt very uncomfortable that their children were messaged," the mother told Fairfax.
"He admitted it straight away and thanked me for bringing it to his attention."