To avoid property disputes, signing a Binding Financial Agreement (BFA, often referred to as a prenuptial agreement) is a fairly common practice. A BFA is a legal instrument that clarifies the property rights and interests of both spouses, ensuring the couple’s financial arrangements are reasonable and fair, and reducing the possibility of future property disputes. Such an agreement is usually negotiated and signed voluntarily by both parties before marriage, but it can also be entered into during the marriage or after the relationship has broken down. It carries legal effect and can set out the specific division, management and succession of property in accordance with the parties’ wishes. In an earlier article, How Is Property Divided After Divorce in Australia?, we covered the function, drafting process and validity of financial agreements. On the question of validity, we have previously noted that a BFA may be set aside if, at the time of signing, one party was (i) the significantly disadvantaged party, or (ii) subject to duress or undue influence, such that the agreement did not reflect that party’s genuine intent. In this article we take the question a step further: if both parties signed the BFA with genuine intent, can the agreement still be set aside or terminated?