The Abuse in Care Royal Commission of Inquiry had two primary information sources:
In 2018 a Crown response secretariat was established to coordinate multiple agencies to engage with and respond to the Royal Commission. The secretariat:
The Royal Commission requested from the Crown historical records it needed for its different investigations. The requests varied widely in scale, from a few documents held by a single agency to thousands of documents across many organisations.
Archives New Zealand also provided the Royal Commission with older records: