Nguyen v Nguyen — enforced a mother’s $80,000 loan against her son but dismissed the guarantee claim against his partner

Case
Thi To Uyen Nguyen v Huy Hong An Nguyen and Nguyet Huu Minh Trang
Court
Supreme Court of New South Wales (Australia)
Date Decided
16 October 2026
Citation
[2026] NSWSC 1267
Topics
Loan agreements; Sham transactions; Forged signatures; Equitable mortgages

Background

Thi To Uyen Nguyen advanced money to her son, Huy Hong An Nguyen, when mortgagee Pepper was preparing to sell his Yagoona property. A written agreement dated 20 November 2023 recorded an $80,000 loan, repayable after 10 years or earlier if the property was refinanced or sold. It also purported to contain a guarantee signed by Huy’s de facto partner, Nguyet Huu Minh Trang.

After the property was sold, its net proceeds of approximately $130,000 were paid into court. Huy admitted signing the agreement but argued that it was a sham: he said the $80,000 was actually a family-settlement payment concerning an earlier transfer of a Bankstown property and that the loan documentation was created to protect the money from a possible claim by Nguyet. Nguyet denied signing the guarantee and alleged that both her signature and the witness’s signature had been forged.

The Court’s Holding

Pike J rejected Huy’s sham case and found that the agreement documented a genuine $80,000 loan made to help him address his mortgage arrears and regain control of the Yagoona property. Contemporaneous bank transfers, correspondence with Pepper and the Australian Financial Complaints Authority, a handwritten acknowledgment of borrowing, and Huy’s communications with the drafting solicitor supported that conclusion. Huy was liable to repay the $80,000 plus contractual interest.

The unregistered mortgage granted by the agreement operated as an equitable mortgage or charge. The debt could therefore be satisfied from the property-sale proceeds held in court, once the plaintiff supplied an updated interest calculation. The Court was not satisfied that Nguyet signed the guarantee and found that Huy had placed her signature on the document without her knowledge. The claim against Nguyet was dismissed, with final calculations, costs, and consequential orders left for agreement or later determination on written submissions.

Key Takeaways

  • A party alleging that a written agreement is a sham must overcome the strong presumption that the document reflects the transaction the parties intended.
  • Contemporaneous transfers, correspondence, acknowledgments, and solicitor records can outweigh later testimony inconsistent with the documented transaction.
  • An unregistered contractual mortgage may operate in equity as a charge enforceable against sale proceeds, but a person whose guarantee signature was placed on the agreement without authority is not bound by it.

Why It Matters

The decision illustrates the evidentiary difficulty of recasting a documented family loan as a sham after the relationship has deteriorated. Even in an informal family setting involving cash payments, the parties’ contemporaneous communications and conduct may establish both the amount advanced and the transaction’s legal character.

It also underscores that enforceability may differ among purported parties to the same document. The loan and equitable security were enforceable against Huy, while the guarantee failed because the Court found that Nguyet had neither signed nor authorized her signature.

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