Transparency International in Papua New Guinea is calling on MPs and political parties to support the government's anti corruption strategy and its public stance on good governance.
It says a key part of this is ensuring financial returns for the election are filed with the Registrar of Political Parties.
All registered parties and successful candidates were required to have lodged their financial returns by the beginning of this month, but most had failed to do so.
The Registrar, Dr Alphonse Gelu, says just 37 of the 111 MPs had complied while a large number of parties were still to submit their records.
Transparency has called for everyone to comply.
It says it is one thing to make utterances on the floor of parliament on corruption and governance but practising this is what matters.