The Impact of Financial Non-Disclosure on Your Family Law Case

If you are undergoing family law proceedings, you must adhere to your duty of full and frank financial disclosure. This means that all relevant documents regarding your assets (including superannuation), liabilities and income must be provided in a timely manner. The Federal Circuit and Family Court case of Willis & Mulder [2025] FedCFamC1A 217, demonstrates the impact of financial non-disclosure in family law proceedings.

Background Facts

The parties married in 2006 and separated in 2021. The wife commenced proceedings in 2023 to seek financial relief. She was the only party who had legal representation. The husband was self-represented throughout the trial.

At trial, the husband claimed he was receiving a Commonwealth old-age pension and had no other income. The parties agreed on which items of property each would retain. The disagreement concerned the quantum of cash payable by the husband to the wife. Quantum refers to the amount of money involved, in this case, the sum of cash the husband was required to pay the wife as part of the property settlement. The primary judge divided the property pool 65 per cent in the husband's favour and 35 per cent in the wife's favour.

In this case, the wife commenced proceedings to seek financial relief. The primary judge found that both parties failed to fulfil

their duty of financial disclosure and neither party took any opportunity to secure more, or better valuation evidence once the hearing had been adjourned. Whilst the parties agreed on the items of property they would retain, the disagreement concerned the quantum of cash payable by the husband to the wife. The wife appealed from all Court orders.

The Fresh Evidence

After judgment was delivered, the wife obtained loan application documents showing that the husband had declared a taxable income of $176,000 per year to a lender. In those same documents, he identified himself as self-employed. This declaration was made shortly after the trial concluded, in which he had told the court under oath that he had no income other than a pension.

The wife applied to the appeal court to have these documents admitted as fresh evidence. Under the test established in CDJ v VAJ (1998) 197 CLR 172, fresh evidence may be admitted on appeal if it satisfies three requirements: it must be credible, it must not have been available at the time of the original hearing, and it must be likely to have produced a different result if it had been before the trial judge. In plain terms, the new material must be reliable, genuinely new, and important enough to change the outcome.

Justice Austin admitted the evidence. The loan documents, comprising a broker's declaration, a tax agent's letter, and the loan application itself, satisfied all three requirements. The Court described the husband's loan declarations as colliding violently with his sworn trial evidence (at [86]).

The Appeal

There were several issues raised during the appeal, including one ground relating to the findings made in respect of the parties’ failure to provide satisfactory financial disclosure. The wife argued that the primary judge failed to utilise her husband’s non-disclosure to her

advantage by:

• Failing to draw adverse inferences against the husband for his non-disclosure;
• Failing to account for his non-disclosure under s 75(2)(o) of the Family Law Act;
• Excusing his non-disclosure; and
• Equating the husband’s non-disclosure to her own non-disclosure, which she believed was less consequential.

The appeal was allowed, but only because of the further evidence adduced in the appeal.

There were no material appealable errors made by the primary judge on the evidence adduced at the trial.

In plain terms: the original decision was not wrong based on what the trial judge knew at the time. The appeal succeeded because the new material changed the factual picture entirely, specifically the assessment of the husband's income and earning capacity under section 75(2) of the Family Law Act 1975 (Cth).

Section 75(2) requires the court to consider a range of factors when deciding whether to make a financial adjustment in favour of one party. These factors include each party's income, earning capacity, and future financial needs, the court considers the factors to divide assets. Because the husband had presented himself as a pensioner with no other income, the trial judge had no basis to make a significant adjustment under this section. The new evidence showed that picture was false.

The issue of Financial Non-Disclosure

The Trial Judge found that the Husband failed to disclose documents to support uncorroborated evidence about his disuse of a bank account, the full extent of his jewellery and his failure to have his jewellery valued. On appeal, Judge Austin did not challenge these findings. Uncorroborated means the evidence stood alone with no supporting documents or independent verification.The Wife argued that these findings were not usefully deployed by the Trial Judge.

However, there were several factors that weakened her argument. The Husband was self-represented. This allowed the Trial Judge to determine that the Husband did not have thorough knowledge about his duty to provide full and frank disclosure. The Husband argued that his failure to produce specific documents was because he was not asked to. Judge Austin did not challenge any findings related to this. The Wife’s submissions regarding how the non-disclosure findings should be practically applied, were also unconvincing. Her main argument was that the husband wilfully failed to provide proper disclosure, so she should receive a greater proportion of property divided.

The Judge drew a distinction between two categories of non-disclosure:

Deliberate concealment: where a party actively hides assets, income, or financial information from the court. This carries significant weight in proceedings and can materially affect the outcome.

Negligent passivity: where a party fails to provide disclosure not out of deliberate intent to hide information but through ignorance or inaction. This should not be disregarded, but it carries less weight than deliberate concealment.

In practical terms, a party who fails to disclose a minor bank account through oversight is treated differently from a party who lies under oath about their income. The former may attract limited consequences. The latter, as this case shows, can result in orders being set aside entirely.

There were several reasons why this argument did not succeed

• Both the Trial and Appeal Judges found this submission too simplistic. Judge Austin explained that evidence of non-disclosure on its own, is not necessarily critical to the outcome of financial proceedings. Additionally, this does not mean that the Court will make a more favourable finding towards the innocent party.
• She did not submit that a finding should be made as to the property of the parties not being identified on the balance sheet. The Court found she did not engage in the overall facts of non-disclosure and any inferences to be drawn from them.
• She did not submit that the Husband’s disclosure failures prevented an understanding of the use and application of his funds post-separation.
• Judge Austin stressed the need to distinguish between “deliberate concealment” and “negligent passivity” when determining how to treat the Husband’s financial non-disclosure. Whilst negligent passivity should not be disregarded, deliberate concealment has a far greater impact on the outcome of proceedings.

The Wife also had a finding of non-disclosure made against her. Whilst she admitted this finding was correct, she still argued that the Husband’s non-disclosure was more significant than her own. This argument did not succeed as it was not an appealable error of law or fact and does not support whether the overall judgment was “manifestly unreasonable”.

The phrase "manifestly unreasonable" sets a high threshold on appeal. It means the outcome must be so clearly wrong that no reasonable judicial officer, properly applying the law, could have reached it. A disagreement about how the facts should have been weighed is not sufficient to meet this standard.

Key takeaways

This case demonstrates the importance of the duty of full and frank disclosure under section 71B. However, a mere misunderstanding of this duty will not necessarily increase the benefits for the innocent party. Financial non-disclosure must be significant in order to have an impact on the final division of property.

A failure to disclose material financial information, particularly where it involves income concealed from the court, can result in property orders being set aside and the matter being reheard entirely.

If you intend to use the other party’s financial non-disclosure to benefit your case, you must have a detailed and persuasive submission, supported by evidence of how this impacts your case. Ensure you also adhere to your duty of full and frank financial disclosure, by providing your lawyer with all relevant financial documentation in a timely manner.

Post-judgment diligence matters. The wife in this case obtained the loan documents after the original orders were made. This illustrates that where concealment is suspected, investigating financial records, including documents obtained through subpoena or from third parties such as lenders, can reveal material information that was not before the trial court and may support grounds for appeal.

Conclusion

Willis & Mulder [2025] FedCFamC1A 217 confirms two principles that apply in any property proceeding where financial non-disclosure is in issue. First, non-disclosure does not carry automatic weight. Its significance depends on what was concealed, whether the concealment was deliberate, and whether the hidden information was material enough to change the outcome. A party who relies on non-disclosure without connecting it to a concrete financial consequence is unlikely to succeed on that ground alone.

Second, a final property order is not immune from challenge where new evidence emerges after judgment. Where that evidence is credible, was genuinely unavailable at trial, and would likely have produced a different result, an appellate court can receive it and set aside the original orders. This applies even where the trial judge made no error on the material before them.

For anyone involved in family law proceedings, the practical message is clear. Your obligation to disclose financial information is ongoing, not limited to the period before trial. And if you suspect the other party has not been truthful, thorough investigation of financial records, including lender documents, tax records, and third-party declarations, may reveal information that changes the outcome of your case entirely.

How The Norton Law Group Can Help

The Norton Law Group comprises a team of Accredited Specialist Family Lawyers has extensive experience in property settlement proceedings, including matters involving financial non-disclosure, complex asset pools, and family law appeals. We are recognised by the Law Society of New South Wales, a distinction held by a select number of practitioners in Sydney.

If you are concerned that the other party in your proceedings has not provided full financial disclosure, or if you have recently discovered information that was not before the court, we can advise you on your options. This includes whether grounds exist to appeal existing orders or to seek further investigation through subpoena or other court processes.

We offer a first free 30-minute phone consultation with no obligation. Whether your matter is at an early stage or you are considering an appeal, our lawyers will listen to your circumstances and give you a clear picture of where you stand and how to move forward.