Nigeria is a heterogeneous society and the heterogeneity reflects in virtually all the social legal institutions in the country including marriage contracts. The Nigerian law recognises three systems of marriage, which are the customary law marriage, Islamic law marriage and statutory marriage. Each marriage is governed by distinct rules derived from their substantive laws. But a new form of marriage contract has evolved in the country – the multi-tiered marriage contract. This form of marriage is believed to have problems in the operation of family law in the country. The purpose of this paper is to examine the nature of multi-tiered marriage; investigate the causes of this type of marriage and highlight its effects on the Nigerian family law. The research employs the use of data from unstructured interviews and legal doctrinal content analysis. The paper uses purposive sampling method to determine the research sample. The research population includes married couples who contracted the multi-tiered marriage. It is found that globalisation has contributed reasonably to the increase in the practice of multi-tiered marriage in the contemporary Nigerian society. The paper finds that there are both legal and social reasons for celebrating the multi-tiered marriage contract in Nigeria.