Paper creases, Paper creases(p. 176), Cause 1> the paper stack is not loaded correctly – Canon imageCLASS MF3010 VP Multifunction Monochrome Laser Printer User Manual
Page 181: Cause 2> damp paper is used, Cause 3> the paper type loaded is not appropriate

Paper Creases
85RS-045
Try one of the following to solve the problem.
<Cause 1> The paper stack is not loaded correctly.
Solution
Load the paper stack is not loaded correctly.
<Cause 2> Damp paper is used.
Solution
Replace the paper stack with new unopened one.
" Supported Paper Types(P. 70) "
<Cause 3> The paper type loaded is not appropriate.
Solution
Make sure that the number of sheets or the paper type loaded in the paper cassette meets the paper
specifications.
" Supported Paper Types(P. 70) "
<Cause 4> There is a foreign object inside the machine.
Solution
Remove the foreign object from the machine.
<Cause 5> Paper creases due to the paper type used or usage conditions of the
machine.
Solution
Change the <Special Mode d> setting from the operation panel.
Troubleshooting
176