There is very little evidence—in fact, no evidence—of any systemic abuse or fraudulent voting in our system. As far as I know, that's true at the federal and provincial levels. There has been much discussion in the U.S. since the last election. Also there has been a substantive lack of evidence to support any allegation of systemic fraud.
There were a few cases, and Elections Canada had controls in place before, during, and after the election to validate any potentially doubtful votes. Again, these cases rarely reflect fraudulent activity, and when they do, they are referred to the commissioner, and after investigation, rarely bring about any charges.