Religious, community, charity, education and sporting groups that fail to meet Tuesday's deadline to join the scheme will be "named and shamed" and face possible financial sanctions and changes to their charitable status.

The Jehovah's Witnesses refuses to join despite the threatened action and legal service Knowmore expects other survivors will also miss out because the organisation responsible for their abuse has not signed up.

"This will result in survivors receiving nothing," Knowmore principal lawyer Anna Swain told AAP.

Institutions have had two years to opt into the redress scheme, with some Knowmore clients saying "they're punishing us" or "they're waiting for us to die".

"A number of survivors have passed away while they have been waiting for this deadline date," Ms Swain said.

Ms Swain said some survivors had deliberately lodged applications despite knowing an institution like the Jehovah's Witnesses had no intention of joining.

"They're doing it to really be able to say you did this and if you don't join you need to be named and shamed for all of the harm that you allowed to happen," she said.

"They're doing it for the unheard voices, to bring awareness about those institutions that are continuing to say that they did nothing wrong or that they can't really be accountable."

The Jehovah's Witnesses said the religion does not have the institutional settings that the voluntary redress scheme is designed to cover and it will not join.

"The Jehovah's Witnesses have not sponsored any programs or activities that separate children from their parents at any time," it said in a statement to AAP.

The statement said the Jehovah's Witnesses did not operate boarding or Sunday schools, did not have youth groups, choirs or sponsor any programs for children, nor run youth centres.

"Jehovah's Witnesses simply do not have the institutional settings that result in children being taken into their care, custody, supervision, control or authority."

Less than 10 redress scheme applicants have referred to the Jehovah's Witnesses, it said.

"Jehovah's Witnesses have responded and will continue to respond directly to individual claims for redress in a caring, fair, and principled manner, taking into consideration the unique circumstances of each claim.

"The religion of Jehovah's Witnesses also provides spiritual comfort and assistance to child abuse victims and their families."

Peak sporting bodies like the Australian Olympic Committee have committed to joining the scheme, along with sporting groups investigated by the child abuse royal commission such as Swimming Australia and Tennis NSW.

Tennis NSW said it and Tennis Australia have signed a letter of intent to join the redress scheme.

"Tennis NSW prioritises the safeguarding of children within our sport and its members unwaveringly," CEO Lawrence Robertson told AAP in a statement.

"Tennis NSW, in recent years, has implemented a number of processes and policies to ensure that us, along with our clubs, are providing the safest environment for the people of our sport."

Football NSW expected to make an announcement before the redress deadline.

As at mid-June, the scheme had received 7133 applications.

Australian Associated Press