Airing secret recordings of Pauline Hanson and James Ashby during a Four Corners investigation into One Nation were not a breach of rules because it was newsworthy and in the public interest, the media regulator has found.

The Australian Communications and Media Authority received two complaints after the show aired in April from viewers angry the show broadcast an "illegally recorded phone call" and portrayed Ms Hanson and Mr Ashby as deceptive and overbearing.

One complainant said as both of them clearly did not want to talk to the ABC "it follows they would not want telephone conversations broadcast without their prior approval".

The decision comes just days after Ms Hanson launched legal action the the Supreme Court of New South Wales restraining the ABC's 7:30 program from airing recordings of conversations between herself and former One Nation treasurer Ian Nelson.