Papua New Guinea's Law Society says it will thoroughly investigate a video that features two lawyers discussing how political figures launder money outside the country.
Lawyers Greg Sheppard and Harvey Maladina appeared in a video on Australian broadcaster SBS, explaining to an undercover investigator how suspect funds could be transferred to Australia by PNG politicians.
Mr Sheppard, from the firm Young and Williams, has since defended himself and says filming another person without their permission is illegal.
The President of PNG's Law Society, Peter Kuman, told the National newspaper that the society has appointed an independent inspector to analyse the firm's trust account over the past five years.
Mr Kuman says the society has written to the lawyers' statutory committee to look into possible breaches of lawyers' conduct rules.
He says there is possible misconduct, construed by simply watching the video.