You are entitled to identify and remove any legitimate reporting errors from your personal credit history. Both Equifax Canada and Trans Union Canada provide investigation request processes. That said, there is no reason to be ridiculous about it. Arguing about former addresses or employers from ten years ago is not going to impact your personal credit score today! But some reporting errors can be very harmful or costly to your score. And such errors might impact you from qualifying for a mortgage or car loan or even a job offer! Here are some errors which you should address:
Collection accounts showing as unpaid or status unknown, when in fact they have been settled Liens showing as unpaid or status unknown, when in fact they have been settled. This often happens with CRA. Missing credit cards and other loan products. It is possible you have multiple profiles with the credit bureau. That is, more than one credit report. This often happens when your name is mispelled.  Your report shows late payments or balances owing which you know to be false. Mismatched date of birth or you changed your name and it is not showing on your credit report.