I went to service Canada to change my last name , the lady told me that my SIN number is not active and she asked me to fill out some forms to reactivate it , and a paper will be send to me after 4-6 weeks with the number , but I was surprised that she took from me the plastic SIN card although it's the same number and they r not going to change it is that ok ? Do they get rid of it in a prober way ? Or should I have asked for it ?