I am curious about this as well. I noticed that the price of the Platinum card went up $45 this year and the value to use this card just isn't as high anymore as a result. So I went to cancel tonight and was told I would forfeit any existing companion certificates. This is a problem because I still have 1 from last year plus I have one they just issued. So my question is, can I still use my one from last year if I cancel? And if I do cancel, can I keep the one they issued me for this year? This thread indicates so, but it's been a little while since the last post. Curious if anyone else (recently) has encountered this.