Brother MFC-8820DN - Manual (Page 165)

11 - 8 USING THE MFC AS A PRINTER
6
After the printed page comes out of the MFC, put in the next
sheet of paper as in Step 4 above. Repeat for each page that
you want to print.
7
When you have finished the print job, close the back output tray.
Caution
Remove each sheet immediately after printing. Stacking the sheets
may cause a paper jam or the paper to curl.