Yes, someone can absolutely apply for the NDIS on your behalf.

If you need help with your application, a family member, friend, carer, support coordinator or nominee can complete the Access Request Form and speak with the NDIA for you.

You'll just need to give your consent for them to act on your behalf by signing the form, or by giving verbal permission when the NDIA contacts you.

If you're not sure who can help, contact your local NDIS office or NDIS partner and they'll connect you with someone who can support your application.