When you report a fake marriage, the first thing that happens is an investigation. The investigators will look at all of the evidence that you have provided to them and try to determine if there is enough evidence to suggest that the marriage was indeed fake. If they believe that the marriage was fake, they will then interview both parties involved in the marriage. During these interviews, they will be looking for any inconsistencies in the story or any red flags that would suggest that the marriage was not legitimate. Once they have gathered all of their evidence, they will make a recommendation to Immigration, Refugees and Citizenship Canada (IRCC). If IRCC believes that there is enough evidence to suggest that the marriage was fake, they will void the marriage and both parties will be required to leave Canada.