Child Support Agreement Form (CS1666) – Fillable PDF

The Child Support Agreement Form (CS1666) is the official document used in Australia to create, modify, or terminate a child support arrangement between parties. This form is required by Services Australia and must be completed accurately to avoid processing delays.

What Is the Child Support Agreement Form?

CS1666 allows you to:

• Establish a new child support agreement
• Request that Services Australia accept an existing agreement
• Replace or end a current agreement
• Terminate a child support liability altogether

The form is available as a downloadable PDF, but filling it out by hand can be time‑consuming and error‑prone.

Why Use a Fillable PDF with Formize?

Formize turns the static PDF into a fillable, interactive document that you can complete directly in your browser. Benefits include:

• Instant field validation – reduces mistakes
• Auto‑save functionality – never lose your progress
• One‑click download of the completed PDF for submission
• Accessible on any device – desktop, tablet, or mobile

Step‑by‑Step Guide to Completing CS1666

Follow these simple steps to fill out the Child Support Agreement Form online:

1. Click the "Fill out this form" button below.
2. Wait a few seconds while the Formize PDF Filler app loads.
3. Enter the required information in each highlighted field.
4. Review the completed form for accuracy using the built‑in preview.
5. Save or download the finished PDF and submit it to Services Australia as instructed.

Common Mistakes & Tips for a Successful Submission

• Missing signatures: Both parties must sign the final PDF before sending.
• Incorrect dates: Use the DD/MM/YYYY format as required by Services Australia.
• Leaving optional fields blank: If a field does not apply, write “N/A” to avoid blank spaces.
• Submitting an outdated version: Always download the latest PDF from this page (the link is updated regularly).

Need extra help? You can contact Services Australia directly or consult a family law professional.