On the ones I have sent in in the past, it stated clearly on the paperwork which UPCs are required. Thus far having done 4 or 5 of these kinds of Canon rebate deals, i have never been asked to send in UPC for the paper.
Read your rebate form beginning to end several times!
As I have omitted stuff as well, having made assumptions. Thus far, I've still gotten the rebate despite my own omissions.
Thanks also for helping out. That's just it. It isn't clear at all. Sorry this is the first bundle I've purchased, mostly get single items, so just a little confused. Which admittedly, happens more often these days.