$20 mail-in offer is for current registered owners (“Qualified Product”) who have registered their product before October 12, 2009.
Purchase and register a new camera (“Qualified New Product”) anytime from October 12, 2009 through December 31, 2009 and get $50 mail-in rebate
List of eligible cameras can be found at
http://www.usa.canon.com/app/pdf/Promotions/MIR_loyalty_form_101209.pdf
I guess this is a good reason I should've registered my powershot earlier in the year.
Granted, I hate these kinds of mail-in rebates where you have to send in everything/and some originals only for them to call/write back long after saying they can't find such and such information that you obviously sent in.