This study is based on detailed analysis of marriage cases handled by native courts and colonial correspondence about the administration of indigenous law in the region of Kayes between 1905 and 1925. Under the heading 'marriage cases', I include not only divorce cases, but also cases related to bridewealth repayments, abandonment of the marital home and cases of 'bigamy' and 'marriage fraud', which I will focus on in this chapter. The region of Kayes is to the west of the colony of French Sudan (modern-day Mali), on the border with Senegal. Kayes was the first colonial capital of French Sudan, before this status was transferred to Bamako in 1908. First, I examine marriage cases which were tried as civil matters. However, from the 1920s onwards, marriages cases in the legal archives that include the terms 'bigamy' and 'marriage fraud' begin to be handled systematically as criminal trials.In this chapter, I will therefore attempt to trace the case law which moved marriage cases from the civil to the criminal courts, and which led 'bigamy' and 'marriage fraud' to appear as offenses in the registers of judgements at Kayes' first-degree courts from 1905 to 1925. These cases are an important source of information on gender relations and disputes between men and women in French Sudan in the colonial period. They reveal complex interactions between men, women, colonial administration and 'traditional' authorities. They also reveal that, contrary to what is often supposed, women did not hesitate to take cases to the courts and the administration in order to defend their marital rights and express themselves about marriage consent and love in a context of colonial legal pluralism. 1The interaction between colonial administration and local populations played out on two levels. On one hand, the administration used indigenous law to its own ends, in order to This is an Accepted Manuscript of a book chapter published by Routledge in Courtship, Marriage and Marriage Breakdown :Approaches from the History of Emotion (2019).