Paper Is Fed Incorrectly
Paper Is Not Fed/Two or More Sheets Are Fed Together 
Is paper loaded correctly?
Fan the paper stack thoroughly so that paper is not stuck together.
Check whether paper is loaded correctly.
Check whether the number of sheets of paper loaded is appropriate and whether the appropriate paper is used.
Check whether mixed sizes and types of paper are loaded together.
Printouts Are Skewed
Do the paper guides align with the edges of the paper?
If the paper guides are too loose or too tight, the printouts are skewed.