A marriage may be voidable if:
- the marriage was a sham;
- a male spouse was under the age of fourteen or a female spouse was under the age of twelve at the time of the marriage;
- one or both spouses didn't consent to the marriage, or agreed to the marriage as a result of fraud or misrepresentation;
- a male spouse was impotent or a female spouse was sterile at the time of the marriage; or,
- the marriage cannot be consummated as a result of a spouse's medical or mental condition.
A marriage may be void if:
- one or both spouses were under the age of seven at the time of the marriage;
- the spouses are within the prohibited degrees of consanguinity set out in the federal Marriage (Prohibited Degrees) Act;
- one or both spouses didn't have the mental capacity to marry at the time of the marriage; or,
- one or both spouses were married at the time of the marriage.
If you run into a situation where you need proof that your marriage was void, the only solution I can think of would be to commence a Supreme Court petition proceeding asking for a judicial declaration that your marriage is void.