Thank you very much for letting me know! Did you submit a Solemn Declaration to get your card back from CIC? Or CIC just sent back the first card once they received it?Yes do not forward is written on envelope .I forwarded my mail also to my new address but Canada post returned it back to immigration . I was checking with immigration every week if they received back from Canada post or not. I took almost 1 month to get my card on new address.