The Times reported that to the inquiry had failed to engage widespread support and interest.
The brief for the campaign is to raise the number of people providing evidence to the IICSA's Truth Project sessions where survivors of abuse can offer personal testimonies.
So far the Truth Project has only held meetings with 500 participants since 2015. In contrast, the Australian Royal Commission into child abuse has worked with more than 7,000 people.
The campaign is to feature outdoor, radio and magazine ads. It will be launched in three regions this month before going nationwide in January.