International application for an Australian child support assessment form (CS1665)

Download and complete the International application for an Australian child support assessment form.

Different rules apply for child support if you’re living in New Zealand. There are specific child support arrangements between Australia and New Zealand. Contact New Zealand Inland Revenue for more information.

If you live in a reciprocating jurisdiction

You need to submit your application through your court or administrative maintenance authority.

Read about reciprocating jurisdictions for child support. You can also check if we have an agreement with the country you live in.

If you live in a non-reciprocating jurisdiction

You need to email us the completed form and any other relevant information. It’s important to note this email address is not secure. You can also send us this form by either fax or post. You can find the fax and postal details on the form.

Read about reciprocating jurisdictions for child support. You can also check if we have an agreement with the country you live in.

If you’re a reciprocating child support authority

Authorities should email the completed form and any other relevant information to us. Remember, this email address is not secure. You can also send us this form by either fax or post. You can find the fax and postal details on the form.

If you live in Australia

You can complete an application for child support assessment online. Read more about applying for a child support assessment.

If you have a disability or impairment and use assistive technology, you may not be able to access our forms. If you can’t, please use self service, request someone to deal with us on your behalf, or contact us. We can help you access, complete and submit them.