The statutory grounds on which a statutory marriage can be void are provided for by the law in Section 3 of the Matrimonial Causes Act and are as follows:
a. Existence of a valid marriage: Where either of the parties is, at the time of the marriage lawfully married to some other person, the subsequent marriage is void. Marriage with a third party under the Act during the subsistence of a valid marriage, whether customary or Islamic will render the subsequent marriage void and is a crime which is known as bigamy. Section 3 (1) (a), Matrimonial Causes Act, Section 33 (1), Marriage Act.
b. Prohibited degrees of consanguinity and affinity: A marriage is also void for lack of capacity if the parties are within the prohibited degrees of consanguinity or affinity. Consanguinity is a marriage contracted between parties who are related by blood while affinity is the marriage of a man with a person to whom he is related through marriage. Section 3(1)(b), Matrimonial Causes Act. It must be said however, that it is possible for persons within the prohibited degrees of affinity to marry each other with the permission of a High Court judge. Section 4 (1) – (2), Matrimonial Causes Act.
c. Non-compliance with the law of the place of celebration: The law of the place of celebration is also known as Lex Loci Celebrationis. Where parties fail to comply with the requirements of the law of the place of celebration with respect to the form of solemnization of marriages, such marriage will not be valid. Section 3(1) (c), Matrimonial Causes Act. A marriage is void under this provision of the law where it is shown that both parties to the marriage had knowledge of the defect in the formalities but willfully acquiesced to its celebration. A statutory marriage must be contracted in a Registrar’s office or in a licensed place of worship or a place prescribed in a special license, it must not be celebrated under false names, a registrar’s certificate of notice or license must be issued under Section 13 of the Marriage Act and the marriage must be celebrated by a person who is a recognized minister of some religious denomination or body or a registrar of marriages. Where parties fail to comply with the aforestated, the marriage will be void under non-compliance with the law with regards to the place of celebration of the marriage. Section 33(2)(a) – (d), Marriage Act.
d. Lack of consent: It is fundamental that parties to a marriage must have freely consented to the union. Where consent is absent, the union is vitiated. Section 3 (1)(d), Matrimonial Causes Act.
e. Either party is not of marriageable age: This entails lack of capacity because of age. If either of the parties is not of marriageable age, the marriage contracted is void. Section 3(1)(e), Matrimonial Causes Act.