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March 22, 2026

Failure to Register an Antenuptial Contract: Can One Spouse Force a Change to the Matrimonial Property Regime?



South African law on correcting an unintended matrimonial property regime, section 21 MPA applications, spouse consent, and negligence claims against attorneys. 

Written by Roy Bregman, an admitted attorney with over 51 years' experience in South African family and matrimonial property law.

A client asked: “Can a court correct a matrimonial property regime where both spouses intended to conclude an antenuptial contract, but it was not executed or registered due to attorney negligence—and can one spouse be compelled to participate in such a correction?”

Can You Force Your Spouse to Change Your Matrimonial Property Regime After Attorney Negligence?

Key Takeaways

  • South African law allows spouses to correct an unintended matrimonial property regime caused by attorney or notarial negligence, but only with a joint High Court application and no prejudice to creditors.​
  • Section 21(1) of the Matrimonial Property Act 88 of 1984 is the primary mechanism to change the matrimonial property system after marriage, and it expressly requires both spouses’ consent.​
  • If one spouse refuses to cooperate (for example, because they benefit from being married in community of property), the court will not impose a new regime unilaterally.​
  • The aggrieved spouse’s realistic remedy is usually a professional negligence claim against the attorney or notary whose failure caused the wrong matrimonial regime.​

South African Legal Framework on Matrimonial Property Systems

Legal principles: correcting an unintended matrimonial property system

Default regimes and antenuptial contracts

South African law starts from the principle that, absent a valid ANC executed and registered before marriage, spouses are married in community of property by default. Where the parties in fact intended to marry out of community (with or without accrual), but attorney or notarial negligence prevented a valid ANC from coming into effect, the law provides two broad routes to seek correction.​

First, if an ANC was validly executed before the marriage but not registered timeously due to error or oversight, the High Court can authorise condonation of late registration under the Deeds Registries Act, with retrospective effect, provided creditors are notified and not prejudiced. Second, if no valid ANC exists and the parties wish to change the system after marriage, section 21(1) of the Matrimonial Property Act 88 of 1984 permits a joint application to change the matrimonial property regime, again subject to sound reasons and protection of creditors.​

Section 21(1) Matrimonial Property Act: Postnuptial change

Statutory framework: section 21 of the Matrimonial Property Act

Section 21(1) of the Matrimonial Property Act is the central statutory authority for postnuptial changes to the matrimonial property regime. It allows a husband and wife, after their marriage, to jointly apply to the High Court for leave to change their matrimonial property system, provided there are sound reasons, proper notice to creditors, and no prejudice to creditors or third parties.​

Courts have repeatedly used section 21 to give effect to the spouses’ true intention where the wrong regime resulted from mistake or professional negligence. However, the wording “husband and wife may jointly apply” is crucial: the statute provides no basis for a unilateral application by only one spouse to change the regime against the will of the other.​

Case Law on Correcting Unintended Matrimonial Property Regimes

Case law: intention, negligence and postnuptial correction

Applications based on mistake and negligence

Several reported decisions illustrate how the courts have approached these applications. In cases such as Ex parte OosthuizenEx parte Spinazze and Another and Ex parte Burger, the courts granted leave to change the matrimonial property regime where the parties intended to marry out of community but failed to execute or register the ANC correctly. The courts emphasised two key elements: the genuine common intention of both spouses, and the absence of prejudice to creditors.​

Rectification where an ANC exists

Rectification is also available where an ANC exists but does not reflect the spouses’ true intention because of a common mistake. In PV v EV (SCA), the court confirmed that an antenuptial contract, as a written agreement, can be rectified where the written terms do not reflect the parties’ actual agreement, provided sufficient evidence of the common intention is placed before the court. Rectification, however, presupposes a valid ANC; where there is none, spouses must use section 21.​

Must Both Spouses Consent to the Change?

The joint-application requirement: can one spouse be compelled?

Why the court requires a joint application

The decisive issue in the client’s question is whether a husband can compel his wife to join a court application to change the regime where she now benefits from the existing system. Both the condonation route (late registration of a validly executed ANC) and a section 21(1) application are premised on a joint approach by both spouses and on the proposed regime reflecting their shared intentions.​

Because section 21(1) expressly requires that “a husband and wife may jointly apply”, the courts have consistently treated the change of matrimonial regime as a consensual adjustment of the patrimonial consequences of marriage. If the wife refuses to cooperate because she prefers the more favourable consequences of being married in community of property, the husband cannot force her to support the application, and the court will not impose a new regime unilaterally.​

Practical consequences and the husband’s remedy

What if one spouse refuses?

Where one spouse refuses to participate, the marriage remains governed by the existing matrimonial property regime, usually in community of property if no valid ANC was executed and registered. The husband’s frustration with this outcome does not create a power to override his wife’s autonomy or to compel her participation in a joint application.​

Attorney or Notary Negligence: The Claim for Damages

In practice, the aggrieved spouse’s realistic remedy lies in a professional negligence claim against the attorney or notary whose failure to execute or register the ANC properly caused the loss. South African courts have recognised such claims, for example in Van Heerden Brummer Inc v Bath (SCA), where an attorney was sued because an invalid ANC left the client worse off on divorce; the measure of damages is typically the financial difference between the intended regime and the regime that actually applies.​

Conclusion

South African law recognises that attorney or notarial negligence can result in spouses being married under a matrimonial property regime they never intended, and it provides mechanisms to correct this by way of court-approved, postnuptial changes. However, those mechanisms are inherently consensual: both late registration of an ANC and a section 21(1) application to change the matrimonial property system require a joint application by both spouses, and the courts will not impose a new regime against the will of one spouse.​

If a wife is content to remain married in community of property because it benefits her, the husband cannot compel her to support a High Court application to alter the regime, even if the original intention was to marry out of community under an ANC. His primary remedy is instead to explore a professional negligence claim against the practitioner whose failure deprived him of the intended matrimonial protection.​

 

FAQ section

Q1: We intended to marry out of community, but no ANC was signed or registered. Are we married in community of property?
Yes. If no valid ANC was executed and registered before the marriage, the default position in South African law is a marriage in community of property.​

Q2: Can I bring a section 21 application without my spouse’s consent?
No. Section 21(1) of the Matrimonial Property Act requires a joint application by both spouses; the court will not grant relief on a unilateral application.​

Q3: What if my spouse refuses because they benefit from the current regime?
If your spouse refuses to join the application, the existing matrimonial property regime remains in place, even if it was not your original intention.​

Q4: Is there any remedy if the problem was caused by attorney negligence?
Yes. You may have a professional negligence claim against the attorney or notary whose failure to execute or register the ANC caused you financial loss.​

If you and your spouse are married under a regime you never intended because of attorney or notarial negligence, or if your spouse is refusing to cooperate in correcting the position, you should obtain detailed, personalised advice before taking any step. Contact Bregman Moodley Attorneys today to discuss your matrimonial property position, assess potential remedies against negligent practitioners, and explore the best strategy to protect your assets and family.

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