Undertaking
The Undertaking form records a written promise to the Federal Circuit and Family Court in a family law case. An undertaking has the same force as a court order.
Word document from Federal Circuit and Family Court of Australia's website.
DraftOur fillable copy of this form has not been through editorial review yet. Check it against Federal Circuit and Family Court of Australia's current form before you rely on it.
- Format
- Word (DOCX)
- Category
- Court form
- Version
- v455bbd57
- Last verified
- 5 August 2026
Federal Circuit and Family Court of Australia · Federal Circuit and Family Court of Australia (Family Law) Rules 2021

For law practices: this form maps to the published matter-field vocabulary, so your practice management system fills it from your matter data - on your own machine. Practice management systems can fetch and assemble it through the document assembly API.
What the Undertaking is for
Under rule 10.18 of the Federal Circuit and Family Court of Australia (Family Law) Rules 2021, unless the court orders otherwise an undertaking to the court has the same force and effect as an order. A written undertaking must be signed by the person or their legal representative and filed. An oral undertaking given in court must be recorded in writing, signed, filed within 14 days and served within 14 days. An undertaking can be given in place of an order, as a promise to do, or not to do, particular things. Breaching an undertaking may be a contempt of court punishable by fine or imprisonment, as the form warns.
When you need it
- You have agreed, or the court has accepted, that you will give a promise to the court instead of an order being made against you.
- You gave an undertaking orally in court and need to put it in writing for filing and service within 14 days (r 10.18(4)).
- For the undertaking about disclosure that every party must give, use the separate Undertaking as to disclosure form.
How to fill it in
- 1
Heading
Mark the court and give the file number and the court date and time the undertaking relates to.
- 2
Parts A to C: parties and the person giving it
Give the parties' names, any independent children's lawyer, and the name and address of the party giving the undertaking.
- 3
Part D: the undertaking
Write each promise clearly and precisely, numbered, so it is obvious what you must or must not do. State the date until which you are bound, or that it continues until you are excused by the court.
- 4
Acknowledgment and signatures
Read the acknowledgment: the terms have been explained, you promise to comply, it has the same effect as an order, and breach may be contempt. Sign and date it with a witness, who also signs and prints their name.
- 5
Part E: lawyer's certificate
If you have a lawyer, they certify that they explained the nature and effect of the undertaking. If you have not signed, the lawyer gives it on your behalf.
Filing, lodging and service
- eFile the signed undertaking on the Commonwealth Courts Portal; if you cannot eFile, file at a registry.
- Serve a copy on the other party or parties by ordinary service.
- If the undertaking was given orally, the written record must be filed and served within 14 days (r 10.18(4)).
Common mistakes
- Make sure you understand every term before you sign. An undertaking is enforceable like an order, and a breach can be punished as contempt.
- Vague wording causes disputes. Specify places, distances, property, amounts and dates.
- An undertaking as to damages has a particular meaning under r 10.18(5); get advice if one is asked of you.
Frequently Asked Questions
Is an undertaking to the family court the same as a court order?
In effect, yes. Unless the court orders otherwise, an undertaking to the court has the same force and effect as an order (r 10.18(1)).
What happens if I breach an undertaking in family law?
You may be found in contempt of court and punished by a fine or imprisonment, as the form warns. The court treats a breach of an undertaking the same way as a breach of an order.
Checked against the official sources on 26 October 2026
- Federal Circuit and Family Court of Australia (Family Law) Rules 2021 r 10.18
- FCFCOA - Undertaking
- FCFCOA - Undertaking (Word form)
- FCFCOA - How do I serve family law documents?
General information about the form, not legal advice about your matter. Rules and forms change: if anything here differs from the court or agency's current instructions, theirs apply.
Field map
3 boxes on the Undertaking fill from your matter. 2 are for you to complete: ticks, signatures and anything that needs judgement.
- Client
- Client full name(s)
- Operator
- Operator signature (image), User Full Name (first + surname)
Matter plans that use this form
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