Hundreds of sites including churches, schools and community groups have now joined the national redress scheme for victims of child sex abuse.

The Passionist Fathers and Carmelite Fathers, which were named at the royal commission, have become the latest to join the scheme.

Legacy Australia, Parkerville Children and Youth Care and Ballarat and Queen's Anglican Grammar School have also announced that they are joining.

The $3.8 billion scheme was established to provide redress to the 60,000 people sexually abused as children in Australian institutions.

It has come under fire due to claims that it is too slow and confusing.

Social Services Minister Anne Ruston says she knows there is a lack of certainty about when institutions will sign up.

“It is completely unacceptable for any institution where child sexual abuse has occurred to shirk their responsibilities,” she said this week.

“I have made it clear I expect all relevant institutions to join the scheme as quickly as possible so that survivors can access redress.”

All state and territory governments and 61 non-government organisations covering more than 41,200 sites such as churches, schools, homes, charities and community groups across Australia are in the scheme.