Do not use the following types of paper. Using such paper will cause not only unsatisfactory results, but also the machine to jam or malfunction.
Folded, curled, or wrinkled paper
Paper that is too thin (weighing less than 17 lb / 64 g/m2)
Paper that is too thick (weighing more than 28 lb / 105 g/m2, except for Canon genuine paper)
Paper thinner than a postcard, including plain paper or notepad paper cut to a small size (when printing on paper smaller than A5)
Postcards affixed with photos or stickers
Envelopes with a double flap (or sticker flaps)
Envelopes with an embossed or treated surface
Envelopes whose gummed flaps are already moistened and adhesive
Any type of paper with holes
Paper that is not rectangular
Paper bound with staples or glue
Paper with adhesives
Paper decorated with glitter, etc.