Marriage annulment in South Africa refers to the legal process of declaring a marriage null and void. Unlike divorce, which dissolves a valid marriage, annulment means that the marriage was never legally valid in the first place — or that it is voidable due to a specific defect.

Void vs voidable marriages

South African law distinguishes between void and voidable marriages:

  • A void marriage is one that has no legal effect from the outset. It is automatically invalid and does not need a court order to be set aside, although parties often approach the court for a declaratory order to clarify their status.
  • A voidable marriage is one that is legally valid until it is set aside by a court. Either party may apply for annulment, but the marriage remains in force until the court grants the order.

Grounds for a void marriage

A marriage may be void from the outset on the following grounds:

  1. Bigamy: if either party was already legally married at the time of the ceremony, the subsequent marriage is void.
  2. Prohibited relationship: the common law prohibits marriage between people related within the prohibited degrees — for example siblings, or a parent and child — and such a marriage is void. Section 28 of the Marriage Act 25 of 1961 deals separately with marriage between a person and the relatives of a deceased or divorced spouse.
  3. Non-compliance with the solemnisation formalities: the Marriage Act sets out how a civil marriage must be concluded — section 29 governs the time and place of solemnisation and the presence of the parties and of witnesses, and section 30 prescribes the marriage formula that the marriage officer must use. A purported marriage that was not solemnised by a duly designated marriage officer, or that departed from these requirements, may be void.

One point is widely misunderstood and worth stating plainly. Failure to register a marriage with the Department of Home Affairs does not, by itself, make the marriage invalid. Registration under section 29A of the Marriage Act exists in the public interest and for purposes of proof; the absence of a marriage certificate does not automatically render a marriage void, and the existence of a marriage can be proved by other evidence. What can invalidate a marriage is a failure to comply with the formalities for concluding it. South African law also has no concept of a “marriage licence” — what the law requires is a marriage officer, the prescribed formula and the prescribed witnesses, not a licence.

Grounds for a voidable marriage

A marriage may be voidable on the following grounds:

  1. Lack of consent: if one of the parties did not freely and knowingly consent to the marriage, it may be annulled. This includes cases of duress, fraud or undue influence.
  2. Mental incapacity: if one of the parties was suffering from a mental illness or disorder at the time of the marriage and was unable to understand the nature and consequences of the marriage, it may be annulled.
  3. Impotence: if one of the parties was permanently impotent at the time of the marriage and the other party was unaware of this fact, the marriage may be annulled.
  4. Marriage of a minor without the required consent: see below — the Marriage Act deals with this case specifically, and the outcome is not what most people assume.

Marriages of minors and want of consent

Where a minor marries without the consent required by law, section 24A of the Marriage Act gives a precise answer. The marriage is not void merely because the parents or guardian of the minor, or a commissioner of child welfare whose consent was required, did not consent to it. It may, however, be dissolved by a competent court on the ground of want of consent.

The timing is strict. An application may be brought by a parent or guardian of the minor before the minor attains majority and within six weeks of the date on which that parent or guardian became aware of the marriage, or by the minor before attaining majority or within three months afterwards. Even then, a court will not grant the application unless it is satisfied that dissolving the marriage is in the interest of the minor.

The current age rules sit in sections 24 to 26 of the Marriage Act. It is worth knowing that the Marriage Bill (B43-2023), which would replace the Marriage Act, the Civil Union Act and the Recognition of Customary Marriages Act with a single statute and set a minimum marriage age of 18 with no exceptions, remains before Parliament and is not law.

The annulment process

The process for obtaining an annulment in South Africa typically involves filing a court application supported by evidence establishing the grounds for annulment. The applicant must demonstrate that the marriage falls within one of the recognised categories of void or voidable marriages. Because a void marriage never had legal effect, the consequences differ from those of a divorce — there is no joint estate to divide and no claim for maintenance arising from the marriage itself, although claims relating to any children of the relationship are unaffected. It is important to consult a qualified legal professional to determine whether annulment is the appropriate remedy and to ensure the process is handled correctly.

Marriage annulment and the types of marriage in South Africa

The grounds for annulment may differ depending on whether the marriage is a civil marriage under the Marriage Act, a customary marriage under the Recognition of Customary Marriages Act 120 of 1998, or a civil union under the Civil Union Act 17 of 2006, since each statute sets its own requirements for a valid marriage. For a broader overview, see our article on the different types of marriages in South Africa. If you are considering annulment as an alternative to divorce, our article on grounds for divorce in South Africa may also be helpful.

In conclusion, marriage annulment in South Africa is a legal process that allows individuals to have a marriage declared null and void. Whether the marriage is void or merely voidable depends on the specific defect. Given the complexity of the process, professional legal advice is strongly recommended.

Updated 15 September 2026 — Removed a case reference that did not support the proposition it was cited for, and corrected the underlying point: failure to register a marriage with the Department of Home Affairs does not on its own make the marriage invalid, because registration under section 29A of the Marriage Act 25 of 1961 serves proof and the public interest rather than validity — what matters is compliance with the solemnisation formalities in sections 29 and 30. Removed the reference to a marriage licence, which does not exist in South African law. Added the rule in section 24A for a minor who marries without the required consent: the marriage is not void, but may be dissolved by a court on application within defined time limits and only where dissolution is in the minor’s interest. Noted that the Marriage Bill (B43-2023), which would set a minimum marriage age of 18, is still before Parliament and is not law, and identified the governing statute for each type of marriage.