The Duty of Full and Frank Financial Disclosure: An Essential Aspect of Family Law

by Marc Testart, Principal | Sept 22, 2026 | Last reviewed Jun 12, 2026

When it comes to family law, one of the most critical responsibilities for both parties involved is the duty of full and frank financial disclosure. However, despite its significance, many individuals and even some practitioners are unaware of the precise requirements of this duty. This article aims to shed light on the duty of full and frank financial disclosure and its implications in property cases under the Family Law Act (Cth) 1975.

What Are The Origins Of Duty Of Disclosure?

The duty of full and frank financial disclosure originates from three main sources: the Family Law Rules (Cth) 2004, the Federal Magistrates Court Rules (Cth) 2012, and case law. These sources collectively outline the obligations and expectations placed on individuals involved in family law property cases.

Understanding the Duty of Disclosure in Family Law Matters

At its core, the duty requires each party to make comprehensive and transparent disclosures regarding their financial circumstances. Rule 13.04 of the Family Law Rules (Cth) 2004 specifies that parties must disclose their financial circumstances fully and frankly. This includes information on earnings, property interests, income from legal entities, financial resources, property disposals, and liabilities.

However, the duty goes beyond mere compliance with the rules. It is a positive and absolute obligation that demands parties to go above and beyond the minimum requirements. It necessitates providing evidence supporting the value of disclosed assets rather than mere identification. Parties must be proactive in their disclosure, volunteering relevant information without waiting to be asked. Moreover, being prompt and efficient in providing financial disclosure is vital for the early resolution of disputes.

The Consequences of Non-Disclosure

The duty of full and frank financial disclosure is absolute, and non-compliance can have significant repercussions. While non-disclosure is not a criminal offence, the court can draw poor inferences against the party at fault. The court may conclude that the undisclosed assets exceed what has been demonstrated, potentially leading to an adjustment of the asset pool.

The Four-Step Process

To comprehend the rationale behind the duty, it is essential to understand the four-step process followed in property settlement cases under family law. This process involves:

  1. Identifying and valuing the assets.
  2. Assessing contributions made by each party.
  3. Adjusting for differing means and needs, if necessary.
  4. Determining a just and equitable order based on the findings.

Full and frank financial disclosure plays a crucial role in the first step, as it helps accurately establish the pool of assets and their values. The court can proceed with subsequent steps based on accurate and transparent data by ensuring both parties disclose their financial information comprehensively.

A Final Note

The duty of full and frank financial disclosure is an essential aspect of family law, specifically in property cases. It is binding upon all parties involved to provide comprehensive and transparent information regarding their financial circumstances. Failure to fulfil this duty can have serious consequences, including harmful assumptions and adjustments to the asset pool.

As a family law firm based in Melbourne, we understand the complexities of financial disclosure and its implications in property cases. We are committed to guiding our clients through this process, ensuring compliance with the duty while striving for fair and equitable outcomes.

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Written by Marc Testart

Principal, Testart Family Lawyers,
Level 3, 489 Toorak Road, Toorak VIC 3142.

Marc Testart was admitted to practice in the Supreme Court of Victoria in 2003 and has practised in family law since 2008. He signed the roll of counsel at the Victorian Bar in 2008 and practised as a barrister until 2013, when he founded Testart Family Lawyers. He holds a Bachelor of Laws with first class honours from the University of Melbourne and was a tutor in law at Ormond College. He has appeared as counsel at trial and on appeal in family law proceedings, including as counsel for the successful applicant in Sare & Rainey [2020] FamCA 207, in which the Family Court of Australia permitted a mother to relocate her two young children to Japan. He acts in relocation matters, including urgent applications for recovery orders and applications to restrain the removal of children from Australia.